I especially like this paragraph:
Concealing your firearm is like having a “No Guns” sign on a business when in reality all the employees are armed. It might be robbed, but you can then surprise the robber with your guns which may lead to a shoot-out. Or, you could put up an “Armed Personnel on the Premises” sign. That would deter most criminals. Why wait until the threat is physical and poses a danger to you before you act?