What's weird is that ever since U-Bolt locks came on the market the proper way to lock a bike was originally the method shown at: http://www.missinglink.org/page/how-lock-bike and LBS's use to even sell plastic fork dropout caps you put on the ends of the forks to protect them from getting scratched on the bottom. I guess those caps didn't sell well so the company that made them went out of business, so in that process of the caps disappearing alternative ways to lock up a bike with a U-Bolt came a long, and one of the ways is the way that Sheldon shows EXCEPT they locked the rear stay as well. I'm not sure how Sheldon came up with his method because for most part he was always right on when it came to bicycles, but a lot of people did his way because he was Sheldon after all. I guess people didn't think someone would hack the rim and take the rest of the bike, but people did, though for most people doing it Sheldons way is fine because they don't live in high enough crime areas that someone would steal a bike unless it simply wasn't even locked up. Where I live there's been a bike sitting propped up against a business sign right beside a busy street for the last two or three days not locked and so far it's still there!!