I was at a small quilt show a few weeks ago and one vendor had a small security camera on each side of her booth. She was recording the whole day on a portable video. She said shoplifters were a bad problem when the booth was full of people. She would have missing fat quarters, notions, pattern, and anything small to slip in a pocket or tote. She said just having cameras visible stopped just about all the theft. Not sure she could find the thief later but I guess could turn it over to local authorities and have proof for insurance or taxes. There are many more kleptomaniacs then just shoplifters then people realize at these shows.