Well, a good start is: only the law abiding will follow gun control laws. A criminal is a criminal because he, by definition, does not obey the law.
The United Bank of Fillintheblank, located in a state where the law abiding citizens standing in the bank line had carry permits and might, just might, be packing heat?
Or...
The Bank of Blank, located in a gun control state, where only the bank guard carries a weapon (taser, probably - guns might kill someone) and faces potential prosecution from civil rights groups if he dares use any sort of force to maintain the peace?