Comment The difference between Apple and Blizzard (Score 2, Informative) 182
The difference between this and Blizzard's RealID is that RealID is a service on tp of the normal friends system in WoW - you can friend someone without giving your name, you just don't get as much info (see what char/server they're on at any time etc). Blizzard marketed it as something to use with people you actually know, not that Death Knight you thought was hot that one evening in Gundrak". That to me made it a lot less objectionable since there was no obligation to use it with all my friends.
Apple on the other hand seem to be going with this by default.