Well here is how I see it .. if you are carrying concealed.. conceal the weapon. Additionally, if I saw you carrying just in your back pocket and not in a holster, I'd say something to you.. e.g. .. dude your gun's showing and put that thing away or in a holster. But that's me and I'm a tad crass some times.

If you want to test the open carry laws.. please have fun, I'll support you as long as you are smart about what you do to test them and are also smart enough to take a copy of both the state and local regs with you.