There are a group of homeless people who hang around a doughnut shop that I patronize. They seem to all ride rather expensive mountain bikes that look very new. I suspect that they are all stolen. Here in California you can license your bike with a state license free at any police station or city hall. Maybe register would be a better term. It really means nothing because if your bike is stolen the police are not going to do anything. If they confiscate a load of stolen bikes they are not going to even check the serial numbers on those bikes. I was thinking that there should be somewhere on the internet that you could post the description and serial number of your stolen bike by your geographical location. Has anyone else got any ideas on this topic?