I really don't understand this whole deal with shopping malls banning weapons. It's completely beyond me for two reasons. First of all, the obvious one, no criminal is going to pay attention to their policies and little stickers. Secondly, I've personally never seen a no weapons sign on any convenience or retail store...it's only the shopping malls!
I used to use the argument that the likelyhood of a licensed handgun owner walking through a mall and shooting people is the same as a licensed car driver taking a spin through the mall and running people over...but lately there have been a few videos online of people driving their cars through malls...so I guess that argument is out the window, lol.
Anyway I'd be willing to bet it comes down to liability, and the fact that IF someone were to be injured by a handgun in a mall, their "policy" prevents them from being held liable by their insurance company.