That's when we should of turned on our mic and talk back a little.
In a nice way of course...
Unfortunately, it's human nature.
The other day I was playing b-ball with a bunch of church members at 24 hrs. We were dominating (but of course) and these guys started to questioned our foul calls. To the point where if we called foul, it was either unfounded or not justified. And the minute we touch them, it's a foul. To the point where we just couldn't play anymore. Either we'll end up in a fight or we'll lose.
Some people just have big heads and thinks the minute you kill them you'll cheating. Or the fact that they lost that round, it's because their teammates sux. All part of the game bro.
What I would do is to report him right back and tell sony that they were very disrespectful and sore losers and used lots of inappropriate languages not fitting for kids that could of been on playing at the time. =) I think they take those reports more seriously.
How DO YOU cheat in ps3 anyways?!? Hehe...didn't think it's possible.