diff --git a/SQL/migrate/V012__Deleteable_mirrors.sql b/SQL/migrate/V012__Deleteable_mirrors.sql
new file mode 100644
index 00000000000..35e9cd5c82a
--- /dev/null
+++ b/SQL/migrate/V012__Deleteable_mirrors.sql
@@ -0,0 +1,29 @@
+--
+-- Implemented in PR #4026.
+-- Adds a deleted_at column for mirrors.
+-- Also adds indexes for speeding up search queries around the ban database.
+--
+
+ALTER TABLE `ss13_ban_mirrors`
+  ADD `deleted_at` DATETIME NULL DEFAULT NULL AFTER `extra_info`;
+
+CREATE INDEX `idx_mirrors_isbanned` ON `ss13_ban_mirrors` (
+  `deleted_at`,
+  `ckey`,
+  `ip`,
+  `computerid`
+);
+
+CREATE INDEX `idx_mirrors_select` ON `ss13_ban_mirrors` (
+  `deleted_at`,
+  `ban_id`
+);
+
+CREATE INDEX `idx_ban_isbanned` ON `ss13_ban` (
+  `unbanned`,
+  `bantype`,
+  `expiration_time`,
+  `ckey`,
+  `computerid`,
+  `ip`
+);
diff --git a/code/modules/admin/DB ban/ban_mirroring.dm b/code/modules/admin/DB ban/ban_mirroring.dm
index c0d90ffdd40..ae2d7001188 100644
--- a/code/modules/admin/DB ban/ban_mirroring.dm	
+++ b/code/modules/admin/DB ban/ban_mirroring.dm	
@@ -30,7 +30,7 @@
 			bad_data &= ~BAD_CID
 
 		if (bad_data)
-			var/DBQuery/mirrored_bans = dbcon.NewQuery("SELECT ckey, ip, computerid FROM ss13_ban_mirrors WHERE ban_id = :ban_id:")
+			var/DBQuery/mirrored_bans = dbcon.NewQuery("SELECT ckey, ip, computerid FROM ss13_ban_mirrors WHERE isnull(deleted_at) AND ban_id = :ban_id:")
 			mirrored_bans.Execute(list("ban_id" = ban_id))
 
 			while (mirrored_bans.NextRow())
@@ -66,7 +66,7 @@
 		log_misc("Ban database connection failure while attempting to check mirrors. Key passed for mirror checking: [ckey].")
 		return null
 
-	var/DBQuery/initial_query = dbcon.NewQuery("SELECT DISTINCT ban_id FROM ss13_ban_mirrors WHERE ckey = :ckey: OR ip = :address: OR computerid = :computerid:")
+	var/DBQuery/initial_query = dbcon.NewQuery("SELECT DISTINCT ban_id FROM ss13_ban_mirrors WHERE isnull(deleted_at) AND (ckey = :ckey: OR ip = :address: OR computerid = :computerid:)")
 	initial_query.Execute(list("ckey" = ckey, "address" = address, "computerid" = computer_id))
 
 	var/list/ban_ids = list()
@@ -78,7 +78,7 @@
 	if (!ban_ids.len)
 		return null
 
-	var/DBQuery/search_query = dbcon.NewQuery("SELECT id FROM ss13_ban WHERE id IN :vars: AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now())) AND isnull(unbanned)")
+	var/DBQuery/search_query = dbcon.NewQuery("SELECT id FROM ss13_ban WHERE id IN :vars: AND isnull(unbanned) AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now()))")
 	search_query.Execute(list("vars" = ban_ids))
 
 	var/list/active_bans = list()
@@ -116,7 +116,7 @@
 	if (!dbcon.IsConnected())
 		return null
 
-	var/DBQuery/query = dbcon.NewQuery("SELECT id, ckey, ip, computerid, date(datetime) as datetime, source, extra_info FROM ss13_ban_mirrors WHERE ban_id = :ban_id:")
+	var/DBQuery/query = dbcon.NewQuery("SELECT id, ckey, ip, computerid, date(datetime) as datetime, source, extra_info, deleted_at FROM ss13_ban_mirrors WHERE ban_id = :ban_id:")
 	query.Execute(list("ban_id" = ban_id))
 
 	var/list/mirrors = list()
@@ -137,6 +137,11 @@
 					items["extra"] = TRUE
 			catch()
 
+		if (query.item[8])
+			items["inactive"] = TRUE
+		else
+			items["inactive"] = FALSE
+
 		mirrors += list(items)
 
 	return mirrors
@@ -169,18 +174,17 @@
 	var/static/list/bg_colors = list("#ffeeee", "#ffdddd")
 	var/i = 0
 	for (var/mirror in mirrors)
-		var/bg = bg_colors[i + 1]
 		var/list/details = mirror
+		var/bg = details["inactive"] ? "#aaaaaa" : bg_colors[i + 1]
 
 		output += "<tr bgcolor='[bg]'>"
 		output += "<td align='center'>[details["source"]]</td>"
 		output += "<td align='center'>[details["ckey"]]</td>"
 		output += "<td align='center'>[details["date"]]</td>"
+		output += "<td align='center'><a href='?_src_=holder;dbbanmirroract=[details["id"]];mirrorstatus=[details["inactive"]]'>[details["inactive"] ? "Reactivate" : "Deactivate"]</a>"
 		if (details["extra"])
-			output += "<td align='center'><a href='?_src_=holder;dbbanmirrorckeys=[details["id"]]'>View Ckeys</a></td>"
-		else
-			output += "<td></td>"
-		output += "</tr>"
+			output += " | <a href='?_src_=holder;dbbanmirroract=[details["id"]];mirrorckeys=1'>View Ckeys</a>"
+		output += "</td></tr>"
 
 		output += "<tr bgcolor='[bg]'>"
 		output += "<td align='center' colspan='2'>IP: [details["ip"]]</td>"
@@ -227,6 +231,22 @@
 	output += "<br><br><a href='?_src_=holder;dbbanmirrors=[query.item[2]];'>Back</a>"
 	user << browse(output, "window=banmirrors")
 
+/proc/toggle_mirror_status(mob/user, mirror_id, inactive = FALSE)
+	if (!user || !check_rights(R_MOD|R_ADMIN) || !mirror_id)
+		return
+
+	if (!establish_db_connection(dbcon))
+		to_chat(user, "<span class='warning'>Database connection failed!</span>")
+		return
+
+	var/DBQuery/query = dbcon.NewQuery("UPDATE ss13_ban_mirrors SET deleted_at = :new_state: WHERE id = :id:")
+	query.Execute(list("new_state" = inactive ? null : "NOW()", "id" = mirror_id))
+
+	if (query.ErrorMsg())
+		to_chat(user, "<span class='warning'>An error occured while toggling mirror status!</span>")
+	else
+		to_chat(user, "<span class='notice'>Mirror set to [inactive ? "ACTIVE" : "INACTIVE"].</span>")
+
 /proc/handle_connection_info(var/client/C, var/data)
 	if (!C)
 		return
diff --git a/code/modules/admin/DB ban/functions.dm b/code/modules/admin/DB ban/functions.dm
index bb47a240948..cd2aa4a2496 100644
--- a/code/modules/admin/DB ban/functions.dm	
+++ b/code/modules/admin/DB ban/functions.dm	
@@ -133,7 +133,7 @@
 	else
 		bantype_sql = "bantype = '[bantype_str]'"
 
-	var/sql = "SELECT id FROM ss13_ban WHERE ckey = '[ckey]' AND [bantype_sql] AND (unbanned is null OR unbanned = false)"
+	var/sql = "SELECT id FROM ss13_ban WHERE isnull(unbanned) AND [bantype_sql] AND ckey = '[ckey]'"
 	if(job)
 		sql += " AND job = '[job]'"
 
@@ -437,7 +437,7 @@
 			if (!match)
 				var/DBQuery/mirror_query = dbcon.NewQuery({"SELECT DISTINCT(mirrors.ban_id), bans.ckey FROM ss13_ban_mirrors mirrors
 					JOIN ss13_ban bans ON mirrors.ban_id = bans.id
-					WHERE (1 [mirror_player] [mirror_ip] [mirror_cid])
+					WHERE (isnull(mirrors.deleted_at) AND (1 [mirror_player] [mirror_ip] [mirror_cid]))
 					AND (
 						ISNULL(bans.unbanned) AND (
 							(bans.bantype = 'PERMABAN')
diff --git a/code/modules/admin/IsBanned.dm b/code/modules/admin/IsBanned.dm
index 5e4ad4371d1..15a7b1a6451 100644
--- a/code/modules/admin/IsBanned.dm
+++ b/code/modules/admin/IsBanned.dm
@@ -44,10 +44,10 @@ world/IsBanned(key,address,computer_id)
 		var/params[] = list()
 		var/query_content = ""
 		if (pulled_ban_id)
-			query_content = "SELECT id, ckey, ip, computerid, a_ckey, reason, expiration_time, duration, bantime, bantype FROM ss13_ban WHERE id = :ban_id: AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now())) AND isnull(unbanned)"
+			query_content = "SELECT id, ckey, ip, computerid, a_ckey, reason, expiration_time, duration, bantime, bantype FROM ss13_ban WHERE id = :ban_id: AND isnull(unbanned) AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now()))"
 			params["ban_id"] = pulled_ban_id
 		else
-			query_content = "SELECT id, ckey, ip, computerid, a_ckey, reason, expiration_time, duration, bantime, bantype FROM ss13_ban WHERE (ckey = :ckey: OR computerid = :computerid: OR ip = :address:) AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now())) AND isnull(unbanned)"
+			query_content = "SELECT id, ckey, ip, computerid, a_ckey, reason, expiration_time, duration, bantime, bantype FROM ss13_ban WHERE isnull(unbanned) AND (bantype = 'PERMABAN' OR (bantype = 'TEMPBAN' AND expiration_time > Now())) AND (ckey = :ckey: OR computerid = :computerid: OR ip = :address:)"
 			params["ckey"] = ckey
 			params["computerid"] = computer_id
 			params["address"] = address
diff --git a/code/modules/admin/topic.dm b/code/modules/admin/topic.dm
index bbe9fd8d1eb..1f0f2a70094 100644
--- a/code/modules/admin/topic.dm
+++ b/code/modules/admin/topic.dm
@@ -97,8 +97,13 @@
 		display_mirrors_panel(usr, text2num(href_list["dbbanmirrors"]))
 		return
 
-	else if(href_list["dbbanmirrorckeys"])
-		display_mirrors_ckeys(usr, text2num(href_list["dbbanmirrorckeys"]))
+	else if(href_list["dbbanmirroract"])
+		// Mirror act contains the ID of the mirror being acted upon.
+		var/mirror_id = text2num(href_list["dbbanmirroract"])
+		if (href_list["mirrorckeys"])
+			display_mirrors_ckeys(usr, mirror_id)
+		else if (href_list["mirrorstatus"])
+			toggle_mirror_status(usr, mirror_id, text2num(href_list["mirrorstatus"]))
 		return
 
 	else if(href_list["editrights"])