Hatch Won't Lock!

[Mudbill]

True. But if you can do it with any entity, why not do it with a sign area?

How do you mean? The reason I said you could do it with any entity, was because it's not the entity that does it, it's the area. You can always add a ScriptArea on any entity, thus effectively make the entity the ones that's interacted with. You can't add interaction elements to a SignArea (?).