Start a contest where some anonymous CPAers send the the guy that's running the contest a paragraph or two, and people try to guess who it is just by their writing style.
Why are people registering under different aliases? This is a worse problem than people not posting... Dementia, I expect to see a thread about this in Magic Issues
Deranged Hermit's signature is alot like someone else's a while ago. I'm pretty sure that it was Daggertooth's old one, but I wouldn't bet my life on it.