"I think in the present case, and many others, a freeper gets embroiled in debate with a certain faction, group, or even just one or a few individual freepers, and then generalizes the faction's attributes to the site as a whole, or comes to see them as intolerably tolerated, or myopically overestimates their influence."
"Self appointed important" This is a phrase I have used over the years to describe of few of my employees who have decided they know better than the whole. Seems you have exactly the same interpretation I do. LOL