But, Evan, I don't believe it to be that hypothetical. I've seen discussion on other boards blow up with folks who had been friendly for a long time become bitter in all their dealings with each other on the boards, with the end result being the exodus of members who were valued for their knowledge around the central purpose of the board.
Like others here, I've been fooling around on discussion boards since they were single-modem BBSes. Over the years, I've seen hot-button issues damage a friendly message board, from SF&F, to writing, to amateur radio, to photography to others I've probably forgotten. In my experience, it's fairly common to happen. It may not be nor become an issue here, but I don't think the potential is quite as hypothetical as the antics displayed in Reefer Madness.
Rick