Trash talking - Does it belong on the chess board?

Life is too short and this is supposed to be fun.  I give everyone the benefit of the doubt.  But if I determine that their motives are not friendly I either tell them what I think of their social graces (or not), hit the resign button, then clear my mind of the memory.  I have too many good friends and worthy, gracious opponents to put up with crap from anyone.

It depends.

If you know the person well, and it is just good natured smack, then fine.

But if you are playing a stranger, this is supposed to be a gentleman's game. Act like one.

Trash-talking should be allowed but not ad hominem-style.

If 2 opponents are equally rated and have a more-or-less equal score against each other, then trash-talking should be present and encouraged, unless they are kids...they are emotional patzers which is not in line with their concrete operations development (hence they can be GM's).    

A patzer should be able to trash-talk a higher-rated opponent. 

A much higher-rated player can trash talk a much lower-rated player but only using veiled compliments.  For instance, if a GM is playing an 1800-level player, s/he can trash-talk with "you might be able to beat an IM with that move, rook-ie" or "you think a 2500-level move is good enough to beat me?!", but not "you suck balls and will never be an 1800-level player, and I train 3-year-olds so I know"...I would allow them to say mean things like that to me (the pain of reality outweighs the fiction of fantasy in my head) but that may require a consent form to comply with tournament trash-talking rules. 

Knives and weak personalities probably shouldn't be allowed in tournaments.  Undercover officers being fed Rybka moves should be present as lower-rated players to see how frustrated a player can get with losing and with trash-talking. 

Anatoly who for FIDE president?