Have a look at the thread about poker etiquette.
Normally I don't chat.
Last week made an exeption in cc freeroll, preFlop I bet 2BB with A7o and a cc regular went all-in (not too far from the bubble), I think we both had about 15BB.
I should have folded, but called (so: bad play from me), reg shows AQs, but a 7 on the turn makes me winner. the reg puts 'nice hand' in chat. I apologized for my bad play.