Just last weekend I saw some guy at PHL put not a wallet, but a fat moneyclip of bills (I saw 100s on the outside) through the conveyor belt. He didn't even put it in a bin, just plopped it on a belt. And when he got delayed going through the gate I loitered a little to watch it for him, since it seemed like an awfully attractive thing for someone to swipe on their way past.