if we are going so in-depth about what more or less legal.....

how many promoters and dj's are not paying taxes for the money they earn? club owners are giving away money when they do parties, how do they justify those expenses in the books?
afaik, there is only cash money going around.
so, if the scene wants protection from the state, that same state could ask: what do I have from it?
hm, maybe these questions are sorted in UK, sorry, I dont know, but here... not even slightly...