I hope I'm wrong here, but this comment by Hermes Franca on the Underground got me thinking:
Hermes made the decision to abide by the commission's ruling and sit out his full 12 month suspension. Vitor Belfort got popped for steroids in October 2007 in Vegas. But instead of sitting out his suspension, he went off to England and fought in Cage Rage in April 2007.
Sorry to say, but I just don't see that happening. What athletic commission in the States is going to license a fighter who not only didn't serve his suspension but didn't even show up at the hearing?