What about all the other cyclists from that era? More were doping than they were clean. Should they be imprisoned too? What about all the doctors who supplied the drugs?
Fact of it is Armstrong had to dope or he wouldn't have won a single title that his abilities deserved. No, I'm not condoning it but he's now beating treated as a scapegoat which personally I think his wrong, and people are going way over the top.
If Armstrong or any of them have in fact committed a provable offence then of course they should be given a sentence commensurate with that offence. As it is Michele Ferrari is facing prosecution.
What I find so very sad is that Armstrong overcame a huge battle with cancer and managed to get back to the top of his career (presumably in the light of what we now know helped by using elicit means). He was considered a hero, a shining example, and the problem with that is that when people get to the very top then the only way is down should they be examined and found wanting. Armstrong isn't the first person in history, sporting or otherwise, to whom that has happened, and nor will he be the last.
Anyway I have zero tolerance as far as drug cheats are concerned whether they do it on a small scale or a much larger one.