I'm not too pleased when I see WoW names, but I don't really dwell on it or anything. What I'm seeing that kinda irks me is seeing simple names that are misspelled, already! My server is a few days old and there are people that just can't think of anything better than Thunnderr.
There is also a fairly large guild on my server with a misspelled name but I don't want to call them out for it.