All hail the great and powerful "Mute" button!
I have been using this little guy so much as of late and I can honestly say that it has improved my experience quite exponentially. If someone says some passive aggressive comment or is just flat out mean; muted.
Most of the time, muting someone before you start to get upset is the best way to go. Granted, I should probably wait a little bit longer to shut that person up, but meh. I don't hear anything else from that player for the rest of the game and I end up having a better experience :)