Blizzard attempted to implement a new policy requiring real-world names on its Battle.net forums earlier this year, but some fierce user feedback quickly convinced them to reverse their decision and legalize anonymity once again. I don't think anyone will confuse the type of community Battle.net has with the interactions that go on using Apple's Game Center, and it doesn't look like any broad stokes of identification enforcement have taken place yet, but Apple has updated its user agreement for their service to clarify their stance on fake names.
