I've had Bliz change 4 of my names. At first they would send me an email saying I had to change it at next login, so I would change a letter or two. It went back and forth about 5 times on the same toon with the same 2 spellings of my name until they changed it for me. That happened on 2 toons and the other 2 they just changed immediately. I still have 2 that are probably against their rules but have never heard anything.