tm changes fixes

code/game/objects/items/explosives/grenades/marines.dm

@@ -505,6 +505,11 @@
 		to_chat(user, SPAN_WARNING("There already is a mine at this position!"))
 		return
 
+	if(antigrief_protection && user.faction == FACTION_MARINE && explosive_antigrief_check(src, user))
+		to_chat(user, SPAN_WARNING("\The [name]'s safe-area accident inhibitor prevents you from planting!"))
+		msg_admin_niche("[key_name(user)] attempted to plant \a [src.name] in [get_area(src)] [ADMIN_JMP(src.loc)]")
+		return
+
 	if(ishuman(user))
 		var/mob/living/carbon/human/human = user
 		if(!human.allow_gun_usage)

code/game/objects/items/explosives/mine.dm

@@ -14,6 +14,7 @@
 	throw_speed = SPEED_VERY_FAST
 	unacidable = TRUE
 	flags_atom = FPRINT|CONDUCT
+	antigrief_protection = TRUE
 	allowed_sensors = list(/obj/item/device/assembly/prox_sensor)
 	max_container_volume = 120
 	reaction_limits = list( "max_ex_power" = 105, "base_ex_falloff" = 60, "max_ex_shards" = 32,
@@ -71,6 +72,11 @@
 	if(active || user.action_busy)
 		return
 
+	if(antigrief_protection && user.faction == FACTION_MARINE && explosive_antigrief_check(src, user))
+		to_chat(user, SPAN_WARNING("\The [name]'s safe-area accident inhibitor prevents you from planting!"))
+		msg_admin_niche("[key_name(user)] attempted to plant \a [name] in [get_area(src)] [ADMIN_JMP(src.loc)]")
+		return
+
 	user.visible_message(SPAN_NOTICE("[user] starts deploying [src]."),
 		SPAN_NOTICE("You start deploying [src]."))
 	if(!do_after(user, 40, INTERRUPT_NO_NEEDHAND, BUSY_ICON_HOSTILE))
@@ -322,6 +328,7 @@
 	icon_state = "grenade_sebb_planted"
 	desc = "A G2 electroshock grenade planted as a landmine."
 	pixel_y = -5
+	anchored = TRUE // this is supposed to be planeted already when spawned
 
 /obj/item/explosive/mine/sebb/disarm()
 	. = ..()