Although the YouTube community is obviously up in arms, is there enough story yet to get media coverage?  If so, I would think that those who have actually suffered from the bans would be in the best position to present the story.  Contacting CSE is just one more approach, even if it's unlikely to succeed.  If CSE's motive is reputation-related, this could present them incentive to stop.  If their motive is sheer malice... well... it's time for plan B... or C.