This is why I laugh at Olympians who whinge about the AFL's testing regime.
You ain't going to get caught if you have some very strong science behind you. Armstrong only ever turned in 1 positive test (pretty sure it was 1, and it was covered up) despite the amount of doping and tests he did.
But they have been caught - isn't that the point? Might be years (even decades) later, but the science caught up with them.
The problem is that when you have the sport governing body in charge of sanctions, then it becomes a massive conflict of interest. Let's be honest, if you were the IAAF you'd want to cover it up too. 55 World and Olympic champions stripped of their gold medals? It'd bring them to their knees, if they're lucky.
I don't quite get your first sentence though. There are guys in athletics in this country alone that have copped bans for not advising the hotel what room they are in.