No one. I don't need to see anyone "go down. To me what the OP suggests is akin to vengeance and personal vendetta. I have no use for either. Athletes use PEDs because the stakes and rewards are so high for being at the top of their fields. Why are the rewards so high? Because the fans by in large demand super human performance and only winning counts.
IMO athletes who use PEDs are not evil. They are people who most likely love their sport who are under a lot of pressure, both internally and externally to show results. (by externally, I don't just mean coaches, managers or doctors, I also mean press, sponsors and fans). PEDs are widely available and have been common for generations. It's easy for "fans" to be highly judgemental when they're not the ones who's livelihood and life long passion/ambition hangs in the balance
Athletes who dope are only responding to the marketplace. Follow the money. What do you get paid for being a winner vs being anonymous Where does the money come from? Ultimately the fans. Don't believe me? Read though the CN and other cycling forums. Racers who don't win are consistently referred to with disdain, called "wheel suckers" , slow, fat, etc by many if not most posters. Look at Tommy D - the guy is a great racer, undoubtedly deserving to be among the elite, but mention his name here and most (not all) posters will heap scorn and ridicule upon him because he hasn't won big time races or "lived up to his potential." I've said this before and I still believe it, if you go by the internet communities, you'd have to assume that the only thing worse than a doper is someone who rides like they're clean.
If someone is caught either red handed or through testing or through hard provable evidence (not hearsay, not innuendo, not circumstantial evidence) then they should pay whatever the consequences that due process prescribes. (BTW, if found guilty they are found guilty, it should make no difference if they confess or deny, are jerks or saints, are stars or off the back). I'm 100% for the best possible anti doping procedures administered in a fair and professional manner with tough penalties. I'm 100% against witch hunts, poor science, and trials conducted by press leaks and tell all books.
I'd love to see pro sports including cycling be clean, but as long as the rewards for success are so great I doubt we'll see that any time soon.