Chuck, it's not like the people who have left (or threatened to leave ... tdawg is still pending) are all crazy whackos. Most of them are quality, down to Earth posters. And several of them didn't even post in the Spin forum.
If I had to guess, I'd say it has to do with the times when a slightly political thread gets posted on the main forum (because it's related to the Angels or MLB), and there's that "golden hour" before the thread gets inevitably moved to the Spin Forum because it gets too political. I've seen you become very, erm, insistent about your right-ring views in those threads