Insulting your opponent
Insulting your opponent could mean calling names, making unkind remarks before, during or after a game.
Discussion
DeathWind: I had some pretty bad experiences before on this.
In my beginner days, I started playing Go in Zone.com. I was called stupid pig in the game several times by one particular player who was much stronger than me at that time.
I happened to met this guy on KGS when I first started playing there as a guest. My skill was slightly inferior to his. He started deriding me whenever I made a careless mistake during the game itself calling me a retard several times in the game. When I lost the game, he suggest that I should name myself 41K instead of 14K (Was using 14K(something) as a guest name) and that I should give up go and was a disgrace to the game.
Vincent: Wow, that's pretty bad. My suggestion is to put people like that on your censored list so you don't have to deal with them anymore.
OneWeirdDude?: You got that right. To me there's little difference between someone like that and a karate student that goes around bullying people.