Speaking of stolen bikes - I once saw an episode of Cops where they left a nice looking MTB leaning against a building and staked it out. Somebody would walk by, see the bike, look around, and hop on it and take off. They would then run him down and arrest him and start over. It was funny but it's a shame that the people they caught were criminals of opportunity and probably not regular bike thieves. I guess it would take too long to lock one up and wait for a thief.