For some reason it doesn't quite annoy me as much when Wikipedia users claim to have military rank they don't actually have, like Commander Keane does. Despite his lack of real life military experience, don't be fooled: User:Commander Keane is a consummate wikiwarrior.
One of User:Commander Keane's many sockpuppets is User:After Midnight, who on May 18, 2007 promptly unblocked Keane after Keane blocked himself "by accident." Right.
It's not enough for Wikipedia to give wrong information in its articles, it also has to give wrong info in user pages: for example, in Keane's user page, he claims that "if you use Firefox you can go to any Wikipedia article by typing "wp Article name" into the address bar." I tried that in Firefox 3.6.2 for Mac OS X: no cigar.