i think i can put up a sign that says "no wristwatches". but unless there is an actual law saying you cant have a wristwatch in a place with a "no wristwatch" sign...all i can do is ask you to leave. and that most likely you are bound to obey. have looked a few times and see no mention of these signs.
somebody should make up some "wristwatches are banned from theses premises" signs with was small caption underneath that says "this doesn't make much sense either" and post them up next to the gun signs.
"Stan, what did I tell you about watching the Osbournes? It's going to make you retarded!" Stan's Mom (south park)