The big question is, can we define objective criteria that separate overtly or primarily political threads (for example, 'DEMOCRATS VS. REPUBLICANS FLAMEWAR LOLWTF!!!11!oneone'), and threads that discuss a non-political topic but with strong political undertones? On one hand, the former type of thread tends to antagonize people without really broadening viewpoints, devolves into personal insults and unsupported assertions, and destroys the community and atmosphere of the forums. On the other hand, we have had plenty of the latter, during which people were respectfully discussing meaningful topics that had links to political subjects, synthesizing opinions and changing viewpoints, but which were closed because of that technicality.
Is it possible to separate the two? Because if it is, as the topic creator said, it would be a tremendous pity to throw out the latter in the name of controlling the former.
By the way, Evan, thank you so much for linking to something that most people know nothing about, but which desperately needs exposure in the West.