One thing that should give athletes pause (though probably won't dissuade them entirely) is that drug testing is getting better. You might test clean now but have your sample retested years later with better tech and be stripped of your medals.
Why would that dissuade anyone? Win a gold medal and keep it (and fame, resulting endorsement deals, etc) for ten years vs don't win it at all, live in poverty and obscurity, etc. Tough choice!
