I'm against bullying. I am. But I'm also against coddling of people who refuse to defend themselves and people who rely on others to combat this crap. I am also for defending of the weak, but the Internet isn't real life, folks. Words are words. Text is text. It's easy to ignore. And I'm sure with this simple understanding, no mature person online is weak. I don't mean to sound like a jerk, but it's the truth.
A small digression... I don't know how much it'll help...
I was bullied a few times when I was a kid (I'm 27 now). I have a funky last name. When I learned to ignore it, and perhaps laugh at it sometimes, it stopped. Later on, in high school, there was a bully who always gave non-popular kids a hard time, and used a means of physical intimidation. I generally avoided him, but there came a day where I was just in a pissed off mood, and he said something really rude. I walked up to him, threw him my backpack, and punched him. He was a lot bigger than me, so I bent over in a defensive position so he couldn't hit my face. I grabbed his ankles and pulled his feet out from under him and hammered away. It took the varsity football team to get me off him. I escaped from about six guys restraining me, and got one last lick in.
No one could help me. This kid was the kind of kid who didn't care about rules or being suspended from school. He was ruthless.
Yeah, it felt good. He never screwed with me again. His life after high school didn't turn out so well.
So anyway, have you ever tried ignoring them and moving on with your life?
Or, you can grow a set and speak your mind. Then ignore if you wish to have the last word. It's up to you.