It all comes down to the individual. If they're a jerk in real life, they're much much worse online cause there are no real consequences for their behavior. If it's people on your server, just black list and move on. I've had to shut off pretty much all chat channels when I play cause people were being annoying. Spamming emotes, bots in /say, people being jackasses in /shout. I just wish we could blacklist while in cross-server dungeons. I seem to end up with two or three people that LOVE to spam those macros that look like pictures, and it's not a good idea to turn off party and alliance chat.