They are goddam annoying. In it the clearest sign that you are playing someone very immature. They just pound away at the taunts until the games freezes and makes life generally unpleasant for everyone. If he's your ally, then you can just stop helping him, or turn on him, but with enemies, I guess you just have to have your team concentrate on the flooder.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."-Albert Einstein