Makes the antitamper mechanism prevent tampering 2: electric boomaloo (#20893)

* Sanitises input on abandoned crates

* Makes anti-tamper mechanisms detect tampering.

* Makes explosion trigger on take_damage() instead.

code/game/objects/structures/crates_lockers/crates/secure.dm

@@ -7,6 +7,7 @@
 	obj_integrity = 500
 	max_integrity = 500
 	armor = list(melee = 30, bullet = 50, laser = 50, energy = 100, bomb = 0, bio = 0, rad = 0, fire = 80, acid = 80)
+	var/tamperproof = 0
 
 /obj/structure/closet/crate/secure/run_obj_armor(damage_amount, damage_type, damage_flag = 0, attack_dir)
 	if(damage_flag == "melee" && damage_amount < 25)
@@ -22,6 +23,20 @@
 	else
 		add_overlay("securecrateg")
 
+/obj/structure/closet/crate/secure/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1)
+	if(prob(tamperproof))
+		boom()
+	..()
+
+
+/obj/structure/closet/crate/secure/proc/boom(mob/user)
+	if(user)
+		user << "<span class='danger'>The crate's anti-tamper system activates!</span>"
+	for(var/atom/movable/AM in src)
+		qdel(AM)
+	explosion(get_turf(src), 0, 1, 5, 5)
+	qdel(src)
+
 /obj/structure/closet/crate/secure/weapon
 	desc = "A secure weapons crate."
 	name = "weapons crate"