If Carvey thinks lefty's evidence is persuasive (it sounds like it is but I think he should point out the specific posts so Carvey can see them) then I'd support banning all three accounts. Alts are allowed but cheating isn't, and if you go through half the contest without mentioning your alts that's obviously an attempt to cheat. But the decision is up to Carvey.
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I made a living on time trial blowing myself off to cross the finish line at ludicrous speed. -transience