And write down your damn serial #!
My good friend is an RCMP officer in surrey and is also an avid mountain biker. He always spots clearly stolen bikes underneath cracked out homeless people. When he stops them he always run the serial number and more often then not it's not reported stolen so he has to let the guy go. Now as a bike lover you can see his frustration. A few days back him and his partner were walking through a squatters village just keeping an eye on stuff and lo and behold he sees his old dj bike that he sold a few years back. He ran the serial number and of course not reported so he had to let it go.
All in all he has managed to return 15-20 bikes to their rightful owners as they DID report them stolen, and oh how sweet it was for him to be able to make an arrest and return a bike. Posting a pic of your bike on here describing it solves nothing, even if you find your bike and decide to go vigilante you're still putting yourself in danger. There's eye out there looking out for your bikes people, help them help you, its not hard. Record your damn #'s and report the bikes if the unthinkable should happen.