There are two ways to look at the thread title, the worst people who trolled this site (which has been most of discussion), or the worst at trolling. SirWood definitely ranks high in the latter as does the recent efforts of Redban. I guess bronz deserves recognition for staying in character for such an incredibly long time, as noted Santander has to shift gears to maintain his high standards. Beet would deserve mention for staying in character for such a long, long time except he's actually <inks>ing real.
