Why not wear one of those handy "Get AWAY from me you lowlife peons!" T-shirts? Jokes asked, don't forget to watch what you eat as well, especially if it's a fast food place where the guy taking the order is also the one cooking it... on a coleman type of stove right behind the counter (no kitchen). I went to my first Sci Fi convention this summer and ended up sitting at the curb outside the hotel sick as a dog during the panel that I was waiting all day to see. Could have used that T-shirt then!