Nil DESPERANDUM Carborundum etc - don't let the Bastards drive you down. I wish I was near enough to be there as I love a good fight against silly laws and the even stupider people who try to enforce them. Reminds me of an incident a few years ago when our local council made a substantial grant to help in running a local Folk FestivAl. On the first evening, the same councils environmental health officer arrived and promptly ordered the closure of most of the venues. We ignored her and enjoyed the inter departmental fight which ensued.
It would be great if everyone attending was arrested and subsequently appeared in court en masse - the press would have a field day.

Best of luck - keep us informed of any developments