Good post. I once had a young female pizza delivery driver pull up to where I was walking and ask me to change a fifty dollar bill for her. Sure lady, I'm going to take your fifty which you may have just run off your printer and give you fifty dollars that I know are the real thing. I don't think so. In the same neighborhood I had a six foot tall man wearing a very tight red skirt in three inch heels ask me where a certain address was. "Uh, I don't know and could you back off a little please."