The sign is there in NV I just happen to have the privledge of NOT having to wander into Reno very often so I can't be sure if it exists anywhere else in the vicinity or state.
I could care less about it being there and I'm sure if I walked in with a gun which I hace both OC and CC no one behind the counter would even notice, dare to say anything about it or even know how to deal with it. Most stop and robs have corporate policies of just hand over the cash and pray you don't get hurt or killed. I would seriously doubt they would say anything. If they did dial 911 it would be after the fact and even if the cop shop did try to do something about what could they really do?
I just hought it was funny more than anything else ESPECIALLY cause it makes no sense at all.