Maybe also they're taking their cues from Xbox Live and all of the raging that comes from a similar aged user-base dropped in with random groups and don't feel like enabling young kids the ability to tell random strangers to go kill themselves...
Just like they support via text based chat right now. It sounds like most of opposition to their reasons against voice chat really is just end-user whining.
You'll always have outliers, but nothing stops those same kids from doing so right now with text chat (and probably at a higher rate). Mute functionality is there for a reason.
