I think there must be plenty of ways to cheat using edge of the law or legal substances as well. Caffiene, blood replacements and hyperbaric chambers come to mind. Im also sure that there is a leading edge of science that drips into professional athletic performance and the authorities are perpetually playing a catch up game. It is well known the various militarys all have research going on to optimise human performance. I think its cheating when it is not evenly available, think the shark skin swimming suits, aluminium bats or some of the more advanced cycle designs. The very nature of competitive sport is to gain an advantage over your opponent. In professional sport winning is everything.
I guess my original point is that yet again a public figure heads off into the sunset after purporting to be someone they are not. He is not the first nor will he be the last. He joins thousands of politicians, sports people, business people, authors, religious leaders, artists, etc, etc who are increasingly getting caught out. Lance plays a very sophisticated media game, that is for sure. But as for me, well fool me once shame on you, fool me twice shame on me. Im rapidly running out of heroes.