My personal opinion is that if I were to try to slam someone the only person I would really be belittling would be myself. Sometimes I have to admit is difficult to walk away from the computer when someone gets nasty. Sometimes I want to be nasty back.But I work hard at having some self respect.
And I firmly believe that what goes around comes around. If I want respect from others then I should give it also. I prefer to feel good about helping others than if I bashed them and walked away thinking that was good. Seen and lived enough of it in my life to know I want no part of it.
And if someone is out of line I think there can be respectful ways to tell them that. They might not see it that way but it is what I try to do.