When you say 'were subsequently found to be doping' do you mean they were found to be doping whilst setting those times.....? Or just found to be doping at some point during their career?
I'll be honest, I'm not sure why you'd even bother watching or commenting on this sort of thing if you literally think everyone is doping. With Usain Bolt, I highly doubt you'll ever know either way. If it came out he was doping, I imagine it'd get covered up because it'd pretty much kill athletics.