Yes, I have seen them in the past, not recently though. I was chosen on a flight going to Las Vegas out of Seattle. I had a lot of cash with me and of course they opened my bag, then questioned me about the amount of cash. I said I was going to Vegas, it was gambling money. They didn't buy it......... so I told them I needed it for tips when I went to Thunder from Down Under. They were happy with that answer....... LOL LOL