I Agree! I ended up buying a headset just so I could turn it on and then put it on mute. However, when I don't have the headset turned on I always have a thing where as soon as I go into a lobby, I mute everyone before doing anything else and it's always a challenge if the games about to start. Maybe they should add an actual in game challenge for doing that!
So mute all please. Must be soooo easy to implment. Fun fun fun
Before 1.08 you could turn voice volume all the way down. It doesn't work now and I spoke to a person and they said they're working on it. Until then we have to manually mute people in the lobby, or, in the 10 seconds before the game actually starts (once you're on the map, choosing class, countdown to start thing) hit select (talking PS3 here) and then mute anyone you want by just pressing X. That's the simplest and fastest way I know of until they fix the problem they made.