Does the chess community have a problem with manners and sportsmanship? Chess can be such an emotional game, when your intelligence is paired up against your opponent's. 

It's great fun at times, but at other times, it seems like we get too sensitive. More so than, say, basketball or even billiards.

I'm asking because I recently faced an opponent on chess.com who, after I offered and he naively accepted a series of gambits, very rudely typed a chat message. Now, we've never even met or played before. And this is a game, is it not? 

So my question is: is there chess etiquette somewhere?
I would say that the chess community does very well in terms of sportsmanship as compared to other competitive endeavors. I think it's a mistake to compare the behavior witnessed in online chess with the behavior witnessed in basketball or billiards (incidentally, two of my other most favorite kinds of competition). I'm sure that anyone who has played any significant amount of online chess has been needlessly attacked at some point (I know I have), but the relative anonymity of the internet is the culprit there far more than anything specific about chess.

I have seen some bad behavior when playing over-the-board chess, but in my experience at least, it is far less frequent and far less severe than typical bad behavior on the basketball court, or in the pool hall. Purely anecdotal, I know, but I still think it's fair to say that etiquette is as alive and well in chess as it is most anywhere else, so long as the participants have to show their faces, or attach their real names and reputations to what they do.