Normally wikipedia admins are free to blank any talk page comments from non admins all they want and then claim they non-admins were child molestors, neo-nazis, trolls, serial killers, scientologists, vandals, taliban terrorists, space aliens, sock puppets, dolphins, or whatever they want to make up.
But eventually an admin will get a comment on their talk page they don't like and revert it thinking this guy's not an admin and well it was a mistake because it turns out it was an admin.
http://en.wikipedia.org/w/index.php?title=...oldid=146977568
Then the shit hits the fan.