If your playing a game competitively then voice chat, WILL ALWAYS, no matter what's the age range, be a good thing. If your playing a game for kicks, and you don't like voice chat, then don't use it, I personally don't mind the 12 year olds (then again I'm 17), and it makes games like WoW or Guild Wars (when doing instances when your a beginner and such), become a lot easier with a voice client.