Christopher Maloney, a naturopathy quack. It turns out he was not responsible for getting Michael Hawkins' blog shut down, the villain responsible is Andreas Moritz, a cancer quack. PZ has posted the letter Moritz has sent to Hawkins, in which he threatens to sue for defamation. Yeah, right. Smart move - now the whole internets will be one your case. Streisand effect FTW.
See: Orac's takedown of Moritz, published long before this whole snafu.
Update: Orac has taken on Andreas Moritz again.