Paerarru. He had just arrived on the board at the time and got into a huge abortion argument (naturally, he was pro-life) Shake's referring to. In literally every post he made there he would call someone a "parrot." He was pretty bad, but not memorable enough to be on a "top 3 worst users ever" list, I reckon.
He shows up on B8 periodically to argue stuff like that. He's a real joy to talk to about evolution, abortion, whether God is real, science in general, the whole bit.