Depends. A lot of times the rudeness is deserved. Like all the people that all they do is call Justin Bieber gay and say Rebecca Black should go die? They deserve the rude comments. But if the Комментарии are rude for no reason, it's a problem.
On Youtube someone was making fun of someone's grammar and honest typoes and called the person they were making fun of uneducated and a dumbass so I called them a grammar nazi and they сказал(-а) I was being racist and purposely being mean to Jews so I сказал(-а) it was a joke and that's all...until they respond... 0__o
If someone posts something rude in the first place and there's a rude response to it I might understand. But it's just so terribly annoying when people don't like a spot and have to keep spamming it like with "I DON'T LIKE THE SPOT!!" Forums. How much they have the need for someone else's attention is remarkable.