Jimmy Wales wrote
And what about the guy who says "I am a Nazi Party member, and I am here to make sure that the POV that Jews are evil is properly represented in the encyclopedia"... or the guy who says "I am a pedophile, and I edit articles related to pedophilia to make sure that the articles show how healthy it is."
I find it pretty interesting that these hypotheticals all seem to have a common 'structure', although of course some are more emotive than others.
Wikipedian: WP works because of positive feedback: people edit, they get a rep here for being NPOV or POV, WP gets a rep because NPOV editors do credit to it, more people come.
Outsider/Lobbyist: You know, that looks hard to do. I can improve your reputation for 'balance', today, by coming to your site and being an advocate.
Charles