I'm struggling with this myself, having just moved here from VA. Still haven't seen anyone OC'ing in the Louisville area, although there *is* a barber shop in Okolona called "The Worlds Safest Barber Shop" where the guys OC and even sell various souvenirs.
Thing is, LEO's can question you but as long as you're obeying the law and not causing a disturbance, you're good to go. Establishments can ask you to leave, and if you cause a stink, argue or refuse they can get you on trespassing charges.
Should be an interesting thread.
BTW you should check out Knob Creek sometime. They're having a machine gun shoot next month too.