If a bike thief didn't know he'd slipped up when he snatched Aaron Rush's new mountain bike, he's certainly aware of it now. Rush posted a "Dear Douchebag Bike Thief" letter all over the racks where the theft occurred, and it's since spread across Twitter and a number of U.K. news sites.

While strolling through Manhattan's Upper West Side one warm summer's day, a concerned New Yorker spotted a bike thief casually removing the front tire off a delivery bike that belonged to a local Lenny's location, and then just as casually walking away.