voice chat are you crazy?!? first of all it violates rules nothing that resemble you in real life that includes VOICe they can still track you by voice. Also not everyone have a microphone or anything like that.
@gameefreak
As far as I know, government agencies don't use a sample of your voice as a way to identify you, so it would be a completely anonymous chat unless you know the other guy in real life. Tracking through an IP address is more likely.