worst players I met, were actually 5 brazilian guys, while playing grid on XBL. Since in grid you can use the flag of your country I put mine (Argentina) and when I entered the race, I started hearing all kinds of insults in portuguese directed to me (spanish and portuguese are very similar so I could understand them), we raced the entire tournament (3 touring car races) and they kept insulting me all the time. I won the first two races, which made it worse, and on the third 2 brazilian cars (there was also a guy from USA) started to race backwards looking for me, to total my car, which they did (and the USA guy too) curiously, we made 1st and 2nd at the end anyway.