I can honestly say, that I never notice anyone commenting on my skills, or lack there-of. I'm usually so busy doing whatever I'm there to do that I pay very little attention to the chat window. All my friends know me and send a tell to get my attention (annoying beep!!!) If it's not a friend of mine, I ignore what they have to say. A) They don't know me, B) They obviously don't know the work and skill it takes to not play several toons at once and C) They haven't read the EULA.
That said, sometimes I try to explain it and try to remember that most negativity stems from ignorance of the facts. When they are enlightened, their tune usually changes to one of respect, frequently with requests to help them with an instance.

My suggestion to you would be to do what I tell everyone to do. Have Fun and don't let someone else tell you how to have fun. If it's not fun, don't do it. It's a game. Games are meant to be fun, not a drag. But being positive in the light of so much negativity is rough, even at the best of times. /ignore helps out a bit, but education of the facts will, imo, win in the end. Make a macro to help out. After all, that is what multiboxing is all about [img]../forum/images/smilies/biggrin.png[/img]

Side Note: I loved the idea of making a note of some really annoying person's name, and contacting them later about the report they put in. I may give that one a shot sometime just for kicks.