" It almost feels like a folk/blues music site when the filter is on."

I can't see why that really makes any difference. Unless you scroll down the page, or push the "BS/Non-music threads are listed below (click)", you'd never know the BS threads were there - and, as has always been the case, there are far more music threads than BS threads.

And only a relatvely small minority of the BS threads are anything to do with politics, even in the extended sense - even if you count the ones about the politics of Mudcat, such as this one.