Mr.K - With this horrible economy, low-life thieves are stealing anything and everything they can get their hands on and not just wheels, but entire vehicles. Even catalytic convertors are being stolen from vehicles as they are parked in public parking lots. The thieves sell the catalytic convertors for the platinum that is inside them.
A set of aluminum wheels and tires are worth a lot of money and they way I see it, life is too short to worry and suffer from stress if we don't have to. So if a set of wheel locks can reduce that worry and stress, then they might very well be worth it. The only drawback I've seen from wheel locks, is that when people go to an auto center for work on their car and the wheels need to be removed, it's been my experience that it's not uncommon for the wheel lock key to become lost and then it's a major pain in the neck getting the wheels off.