I curse like a sailor on the River Styx, but I vent out my aggression through exercise.
As far as video games are concerned, there's a good chance that most of the "problem people" in question are too young to be playing those games in the first place. I couldn't stand Xbox Live and had to quit when it seemed impossible to have decent folks on there in a random match without some loudmouth with the mentality of a baby kangaroo ruining the entire experience.
I think anonymity plays a much greater role in these social problems, especially in today's media-centered world. Just look at the various online/phone conversations expressed solely in text. For every ounce of civility, there is an ocean of unrest, bigotry, immaturity, and online-ego that boils into textual aggression. Without someone to slap their hands (e.g. a moderator or admin), the behavior continues. Now you know what's funny? I think life has its own moderators and admins in the household. I wonder, oh how I wonder, who these people could be, and how they could positively affect kids...