Jealous of your success with the site.
Trying to get attention and many replies to their obnoxious views.
Are malcontents, disruptors, negative people that have problems getting along with anyone.
Are people that are not happy unless they can stir up a controversy.
Are ones who are attempting to take over the running of the site, or if that fails, to draw people to their alternative site. However, on their alternative site they are unable to provide the draw of FR but instead merely gossip about FR and run it down. They therefore can draw those who like to tear people down and trash the site or reputation of the owners.
How come when these people are posting here, they eat up tons of bandwidth with all their complaints, questions, etc?
Why invite them back and why worry that they are content here. They won't be content but will only seek to do you and your site harm. If they are unable to abide the rules, then they need to go somewhere else where they will be happy - not attempt to change this site to make it conform to them.
Nonconformists? No - they don't want to conform - they want all of us and the site and the site owners to conform to them. Let them go and take their fans with them. Why do they keep trying to come here.