I sometimes chat while I'm playing if I find the company and topics enjoyable but I don't try flame them or make them tilt.

I've noticed an added bonus... chatting this and that makes my image more nice or simple (can't find the right word now since english isn't my mother tongue). It makes them feel more at ease and not to concentrate enough.

They are more inclined to make mistakes and they seem to be more willing to lose a hand to a friendly soul than a bully.

I have to admit that I sometimes flame a bit when I succeed in a "tricky" move and bust their stack. It's just so fun I can't resist it.