Perplexity's real name is Ron Harvey. He lives in London, UK.
In 2006 several members took his avatar and used it in an act reminiscent of avatarism. He PMed the mods about the posters violating his copyright and he threw one grand hissy fit. This turned into a giant flamewar and Perplexity was banned.
Return of the prodigal son
He returned as Sauna who at one point deleted all his posts for no apparent reason. His new identity was a poorly-kept secret until redarmy11 dared to make it public.
He has recently renewed his crusade against moderators he considers to be Nazis, most particularly James R, opening a new field of battle in this encylopedia. Some would say this is sour grapes.