In PA, if a mall has a no guns sign posted, and you carry concealed into the mall, you will be fine unless caught of course. And if you are caught you will be asked to leave. If you are caught coming back doing the same thing, you will be cited for trespassing. That is the law. I believe it is similar for workplaces and colleges. No serious charges can be brought AFAIK.
Forgot to add, PA has no “printing” law.....you can print through the clothes all day long. Also, no brandishing law.