Lim, I think it is no coincidence that of all the confirmed dopers in recent memory the only two riders to attack the process with a complete legal onslaught were Americans, Hamilton and Landis. Others threatened (if I remember) but never followed through. I think this is for two primary reasons.
1. The current culture in America promotes this behavior. The saying 'sue 'em' is commonplace and almost slang in many parts. This behavior is promoted because it is possible for plaintiffs to win money, sometimes large sums, for BS. Most of these cases are settled out of court because the defendant realizes it will cost as much or more to fight the case (with an expensive lawyer) than to just 'pay off' the plaintiff. And if you win as the defendant, you gain nothing in the end and usually lose thousands to the lawyer. Additionally, most cases are taken by lawyers for no fee unless the plaintiff wins. Thus the plaintiff has no personal liability for bringing forth a case with little merit. I know Landis and Hamilton had to pay lawyer fees, but to avoid this, they set up 'foundations' which essentially provided them the same scenario. While in Europe I never found this behavior, and when talking with Europeans, I again find this culture foreign to them, which is good for you across the pond.
2. America is plagued...I mean full of aggressive lawyers. They have to make a living like everyone else and civil litigation can pay the bills and even be very profitable. There are many lawyers and firms across the country willing to take on such cases. Our law schools produce more lawyers than we need which causes much of this mess.