When LA called Simeoni a liar, they were off the race course. None of us know for sure whether Simeoni was telling the truth. If Simeoni wants to go to court to argue his honesty, let the chips fall where they may. (Some articles say he's sued, others say he will sue. What's the scoop?)
LA's move against Simeoni in the TdF did taint the win a little, but it also falls in the long tradition of athletes settling scores in competition. And the whining of Italian fans falls in the long tradition of, well, whining by fans of all sports.