I used to live in Skegness, and one Christmas, perhaps 10 years ago, they took over the entire sea front car park. All the pubs had to close, because when they use the loo, they don't 'do' it down the toilet, they do it on the floor, and it wasn't fair to expect people to have to clean up after them. They linked into the electric power from a lamp post on the site, and when they left the whole area had to be pressure washed. 'It', and you can guess what 'it' is was done anywhere and everywhere. There was even a pair of jeans which someone had just stepped out of.
I agree with LoftyLottie that the police are scared of them, they let them come through lots of counties until they got to Lincolnshire - they could have been turned back at any step of the way. Skegness really closed down for about a week because no-one dare go out. My late husband was involved with some of the clearing up, it was awful. They threatened they would 'put the windows in' down the main shopping street if anyone was arrested.