Tell me where you are every two hours

During the Olympics in 2008 the athletes will have to tell the anti-doping organisation were they are every two hours. Not only during the games but also in the weeks leading to it (link).
I agree with the fact that we have to check atletes on the use of doping but forcing somebody to tell you where you are every two is over the top. I think we have to take a step back and look how we can do this without invading the privacy of the athlete.