This sounds a lot like all those people who are 
irritated by anime fans who sprinkle Japanese in 
with their English.  Why is it so irritating, 
anyway?  I mean seriously, yes it's a little 
annoying to people who don't understand, but 
then, there are also a lot of English words out 
there most of the English-speaking world doesn't 
get.

Anime fans speak like that, and chose Japanese-
sounding handles, because they think it sounds 
cool.  Let them be who they are.  I like to wear 
a cloak rather than a normal coat because, 
honestly, I think it looks cool.  If that's a 
trait some one wants to have, then let them.

Sorry if this sounds like it's aimed dirsctly at 
you, ENJ.  ^^;  It's not, honest.  It's more 
aimed at the authors of certain letters over at 
Anipike. 

I do have one interesting tidbit for you,though.  
My school has a lot of Japanese transfer students 
who use English names instead of their real 
ones.  But no one finds it annoying or 
confusing.  Deshou? ;-)