==BTW, re: "Optimist on the run"'s comment== 
 If you truly believe that there are no active users who have an offensive username,I think you folks better wake up and smell the coffee.   

 I'll give you credit for catching: 

 :Dick Butkus (dick-butt kiss) 
 :Hugh G. Rection (huge erection) 
 :Stierscheisse ("bullshit" in German) 

 But overall, your "offensive username patrol" seems to be a pretty dismal failure I spent only about 20 minutes searching the Wikipedian User list and came up with these unblocked users: 

 *Basha ("fucker" in Swahili) 100s of these 
 *Ben Dover ("bend over") a couple dozen variations 
 *Bowcyat ("cocksucker" in Jamaican) 
 *Bumba wiki ("wiki asswipe" in Jamaican patois), there are a few other "bumbas" in there, also. 
 *Cazzo ("fuck in Italian) dozens of these, including "Cazzo Pugno" = "fist fucking" 
 *Cipa ("cunt" in Polish) 100s of these, including the interesting polyglot: "Cipa travel" e.g. "traveling cunt" = "whore" 
 *Dick Hertz (do I even need to explain?)  also:  Dick Hardlove, Dick Hardt, Dick Hardwood, Dick Harry 
 *Ficken ("fuck" in German) a dozen variations, including "Fickendu" = "fuck you" 
 *Harry Balsagna ("hairy balls on ya") 
 *Jodetteputo ("fucking bitch" in Spanish-slang) 
 *Koorva ("fuck" in ukrainian) 
 *Kuso ("shit" in Japanese) 100s of variations 
 *Layno ("shit" in Ukranian) at least 7 that I saw 
 *Merde ("shit" in French) 100s of variations on this theme 
 *Mike Hunt ("my cunt") 100s of variations 
 *Putz ("penis" in Yiddish) 100s of these, including many indicating the user knows -exactly- what it means 
 *Schmuck ("penis" in Yiddish slang, in the sense of "he's a dick" or he's a dickhead") nearly 100 variations 
 *Stugots, Stugotz ("balls", as in testicles, in Italian-Ameircan slang, from Italian:  "stu cazzo") several variations 

  
 :That adds up to a couple thousand users right there, and I'm sure I barely scratched the surface.  Fascinating study, really. 
 You may be "protecting" Wiki users from "Fartwrangler," but the international Wiki community is laughing at you behind your collective back.  When you compare "Fartwrangler" to "Fucking Bitch" and "Travelling Cunt" it really doesn't seem all that offensive, does it? 

 I hope you can see that I'm trying to help you people out here.