http://history-is-made-at-night.blogspot.co.uk/2012/12/norfolk-police-smash-up-speakers-and.html

vs

Rob Booth's Warehouse Party mixes.
http://thequietus.com/articles/10991-electronic-explorations-warehouse-sessions-truss-kangding-ray
http://electronicexplorations.org/?show=dj-skirt

"Illegal rave", "Music with a repetitive beat", "Criminal Trespass Bill", "Warehouse party", "Unlicensed Music Event", "a charge of committing unauthorised licensable activity", There's a rich vein of semiotics in the UK around this area.