Doesn't this thread just throw up the basic libertarian dilemma?
(I mean freedom loving- not the US political Party)
Everyone wants to be free to do what they like without asking anyone's permission.
But everyone wants "them", or "the authorities" to put a stop to other people who do what they(the others) like, when that stops them (the freedom lovers) from doing their thing.
So -
I want to busk without getting a licence.
THEY should not be allowed to use amplifiers.

The problem with anarchy is that the winner is usually the biggest, richest, loudest, most violent.
The problem with bureacracy is that the winners tend to be the best at playing it safe.

Is there a middle ground?
Cheers
Dave