Referring to point 3 I think you may have got the terminology the wrong way round. When hearing the term Folk Police I've always thought it referred to the people stopping the dissidents from performing their own brand of folk rather than the dissidents themselves. But mebe this is a form of defence; by labelling those challenging the status quo as the Folk Police, the real Folk Police become the Secret Folk Police there by causing confusion.

By the way, I wasn't aware that Status Quo had written anything vaguely folky apart from 'Pictures of Matchstick Men'. But I'm now expecting them at a folk club near me any day and I expect that the Secret Folk Police will be out in very secrect force.