Adds friendly fire check for some ranged hostile mobs

code/modules/mob/living/simple_animal/hostile/hivebot.dm

@@ -19,6 +19,7 @@
 	projectilesound = 'sound/weapons/Gunshot.ogg'
 	projectiletype = /obj/item/projectile/hivebotbullet
 	faction = list("hivebot")
+	check_friendly_fire = 1
 	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
 	minbodytemp = 0
 	speak_emote = list("states")

code/modules/mob/living/simple_animal/hostile/hostile.dm

@@ -16,6 +16,7 @@
 	var/ranged_message = "fires" //Fluff text for ranged mobs
 	var/ranged_cooldown = 0 //What the starting cooldown is on ranged attacks
 	var/ranged_cooldown_cap = 3 //What ranged attacks, after being used are set to, to go back on cooldown, defaults to 3 life() ticks
+	var/check_friendly_fire = 0 // Should the ranged mob check for friendlies when shooting
 	var/retreat_distance = null //If our mob runs from players when they're too close, set in tile distance. By default, mobs do not retreat.
 	var/minimum_distance = 1 //Minimum approach distance, so ranged mobs chase targets down, but still keep their distance set in tiles to the target, set higher to make mobs keep distance
 
@@ -229,7 +230,13 @@
 				M.Goto(src,M.move_to_delay,M.minimum_distance)
 
 /mob/living/simple_animal/hostile/proc/OpenFire(atom/A)
-
+	if(check_friendly_fire)
+		for(var/turf/T in getline(src,A)) // Not 100% reliable but this is faster than simulating actual trajectory
+			for(var/mob/living/L in T)
+				if(L == src || L == A)
+					continue
+				if(faction_check(L) && !attack_same)
+					return
 	visible_message("<span class='danger'><b>[src]</b> [ranged_message] at [A]!</span>")
 
 	if(rapid)

code/modules/mob/living/simple_animal/hostile/syndicate.dm

@@ -25,6 +25,7 @@
 	atmos_requirements = list("min_oxy" = 5, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 1, "min_co2" = 0, "max_co2" = 5, "min_n2" = 0, "max_n2" = 0)
 	unsuitable_atmos_damage = 15
 	faction = list("syndicate")
+	check_friendly_fire = 1
 	status_flags = CANPUSH
 	del_on_death = 1