Pretty sure DC Universe Online has it and it's completely obnoxious.
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EQ2 has built in voice communication, and it's awful. They also have proximity chat, and it's also awful. I only ever used it one time for 10 minutes during a memorial service for a friend who had passed away, and there were people from lots of different guilds around. Even with it being in-game, most guilds prefered their own TS/Mumble/Vent servers because the quality and reliability was infinitely better.
Last thing I want to hear is little kids screaming or yelling, erotic role playing or just straight up being rude for no reason. You see how heated some of the chats gets over a simple screw up? Don't wanna hear it blowing out my headphones....then again let em, I'll gladly krank up my J-pop and anime songs and let it blare the entire time. :3