The existing entity protection feature is based on UUIDs, which can be tricky if you want to protect entities coming from a spawner, that are supposed to get a new UUID every time they spawn. For example, I often use item spawners as timers, to control other spawners, and all sorts of other things.

What would be handy is a "wiring" zone type that is exempt from butchering. It would also be nice if spawners in this zone could be activated by any player, since they are more likely to have a technical purpose and may need to be active all the time.

I think it's probably best to give them two seperate tags though: one for the protection against butchering and one to allow spawning from any player.