I witnessed the same type of stuff at Smyrna. The show rules specifically stated NO BACKPACKS, so I left my camera backpack in the car. I end up shooting next to a guy all afternoon that had the same camera backpack that I left in the car. I asked him how he got that in and he said that he told them it was a camera bag and they said "don't worry about it, go right on in". After noticing that, I started noticing every other backpack in the place.