To be clear, I'm not advocating starting a thread on how the Greens will triumph over our hated enemies the Blues. Even when posting about a political issue, it would be best to steer clear of color politics. But if someone wants to make a post about a relevant political issue, there should be a place for that.

Possibly with a clear warning at the top that the post is about politics, and comments should remember to avoid color politics. Maybe a standard infobox or something.