I am sick of people. If you don't know the person personally, than you can't talk crap about them.
If they did something to your friend, not physically, but changed a little, than don't hate them. If a friend is talking about their other friend, you don't say, "Oh I don't know him either, and I hate him." Okay than, but you don't need to tell them because it is mean, plus you don't know them. Learn some respect and don't say what is unnecessary!