Does this work? NO IDEA

code/modules/client/client_procs.dm

@@ -279,7 +279,7 @@ GLOBAL_LIST_EMPTY(external_rsc_urls)
 			continue
 
 		if(C.prefs)//supposedly fixes a runtime with the following lines. Ripped from OldPollo. I miss you, Lads. :(
-			if(C.prefs.toggles & CHAT_OOC)
+			if(C.prefs.toggles & ANNOUNCE_LOGINP)
 				to_chat(world, "<span class='notice'><b>[src.key] has connected to the server.</b></span>")
 
 				if(C.prefs.toggles)

code/modules/client/preferences.dm

@@ -981,6 +981,8 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 			dat += "<b>Play Lobby Music:</b> <a href='?_src_=prefs;preference=lobby_music'>[(toggles & SOUND_LOBBY) ? "Enabled":"Disabled"]</a><br>"
 			dat += "<b>See Pull Requests:</b> <a href='?_src_=prefs;preference=pull_requests'>[(chat_toggles & CHAT_PULLR) ? "Enabled":"Disabled"]</a><br>"
 			dat += "<br>"
+			dat += "<b>Announce Login:</b> <a href='?_src_=prefs;preference=announce_loginp'>[(toggles & ANNOUNCE_LOGINP)?"Enabled":"Disabled"]</a><br>"
+			dat += "<br>"
 			if(user.client)
 				if(unlock_content)
 					dat += "<b>BYOND Membership Publicity:</b> <a href='?_src_=prefs;preference=publicity'>[(toggles & MEMBER_PUBLIC) ? "Public" : "Hidden"]</a><br>"
@@ -2635,6 +2637,9 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 					else
 						be_special += list(be_special_type)
 
+				if("announce_loginp")
+					toggles ^= ANNOUNCE_LOGINP
+
 				if("name")
 					be_random_name = !be_random_name
 

code/modules/client/preferences_toggles.dm

@@ -365,6 +365,17 @@ GLOBAL_LIST_INIT(ghost_orbits, list(GHOST_ORBIT_CIRCLE,GHOST_ORBIT_TRIANGLE,GHOS
 		to_chat(src, "<span class='notice'>You will no longer examine things you click on.</span>")
 	SSblackbox.record_feedback("nested tally", "preferences_verb", 1, list("Toggle Ghost Inquisitiveness", "[prefs.inquisitive_ghost ? "Enabled" : "Disabled"]"))
 
+/client/proc/toggleannounceloginplayer()
+	set name = "Do/Don't Announce Player Login"
+	set category = "Preferences"
+	set desc = "Toggle if you want an announcement to the server when you login during a round"
+	if(!holder)
+		return
+	prefs.toggles ^= ANNOUNCE_LOGINP
+	prefs.save_preferences()
+	to_chat(usr, "You will [(prefs.toggles & ANNOUNCE_LOGINP) ? "now" : "no longer"] have an announcement to other players when you login.")
+	SSblackbox.record_feedback("nested tally", "preferences_verb", 1, list("Toggle Player Login Announcement", "[prefs.toggles & ANNOUNCE_LOGINP ? "Enabled" : "Disabled"]")) //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
+
 //Admin Preferences
 /client/proc/toggleadminhelpsound()
 	set name = "Hear/Silence Adminhelps"