This post has been marked by the post author as the answer.
No.
You can hide entities and then show them when you want to, also move said entity to a new position.
So if what you are after is randomly spawning ammo for example you could do it that way. Just hide the ammo when picked up and move it to a new position, then after some delay show it ready to be picked up again.
Been there, done that, got all the T-Shirts!
