It's mostly the personal attacks that can get out of hand, roasts and teasing have their place even constructive criticism is fine. What purpose does attacking another person because you disagree with them serve?
IMGFLIP MODERATORS: "IF YOU DON'T LIKE SOMEONE'S COMMENT, FLAG THEM AND MOVE ON. THAT'S WHAT THE FLAG BUTTON IS FOR"; ALSO IMGFLIP MODERATORS: "YOUR COMMENT HAS BEEN DELETED AND YOU ARE BANNED FROM COMMENTING FOR 8 HOURS DO TO OUR FEELINGS BEING HURT"