What's this button do...?

I have a work counter in my pro-shop.  It's set up so players or customers can come in and work on their guns while I sit on the other side keeping an eye on them. (The other eye is watching the sales counter.)

Every now and again a gun will be left on the counter (always with a gun plug) either fixed or in the middle of repair and it never, ever fails to amaze me how someone will walk in and pick it up.

Who in their right mind would pick up a gun without knowing something about it?  Maybe I'm wrong.  Maybe I'm over reacting like I sometimes do.  But to pick up a gun, without knowing if it is loaded, or if the safety is on or even working or if maybe parts might fall off ...I don't think so. Heck it might even be attached to a trip wire attached to a nuke.

Don't accuse me of over reacting!