“WARNING! This is not a gun free zone! WE ARE ARMED! Any attempt to disrupt or harm will be dealt with in an overwhelming display of force!”
You know. An enterprising fellow could probably make off with a lot of firearms stored improperly in vehicles.
Also. “Overwhelming force” sounds like a threat. The kind of threat that gives me reasonable belief that when you get angry, you get shoot-y. Probably want to take that down before it leads to evidence of premeditation.
You realize that if you have a beware of dog sign and your dog attacks someone, suddenly it becomes a “you knew you had an aggressive dog”- even if it was “just a joke, bro”?
They might think it’s just a joke, but if an incident happens, lawyers will have a field day with that.