Keeping trolls away is one thing. How much information IS NOT there because they want 15 posts first. So you end up with thousands of bullshit posts, and plenty of thread-jacking.
As far as Big Al, he's a good guy. I sold my XJ to him. The marketplace brings traffic to the site. Big Al is active in the marketplace, so Big Al does contribute something in his own way. Maybe he has enough friends already?