It's easy: Just arrest the owner of the property. Here are some direct quotes:
[b]
A Lincolnshire farmer has accused police of failing to stop illegal ravers from taking over his sheds on New Year's Eve. David Benton, of Moorby, said about 70 revellers smashed down his farm gate, drove a lorry-load of disco equipment onto this property and set fire to pallets.
He called Lincolnshire Police, who sent two officers, but said ravers could not be evicted because there were fewer than 100 trouble-makers involved.
Mr Benton, 44, said: "I will defend my property, and I will use violence if I have to if this happens again. The police have already said they will arrest me if I do."
[i]'Totally irresponsible'[/i]
"It was like being a farmer in Zimbabwe - the police stood outside the gate while inside people were smashing up my property and they were doing nothing about it."
Lincolnshire Police said officers could only intervene to break up rave parties if certain criteria were met.[/b]
source:
[url]http://news.bbc.co.uk/hi/english/uk/england/newsid_1740000/1740151.stm[/url]
There's more:
[b]
Police arrested an Essex farmer on Boxing Day when he tried to confront ravers who took over his barn for a party.
Police said the 40-year-old Essex farmer, Graeme Stephen, from Great Dunmow, was arrested to prevent a public order disturbance.[/b]
source:
[url]http://news.bbc.co.uk/hi/english/uk/england/newsid_1742000/1742964.stm[/url]
Damn, I'm glad I live in Texas.
[(:|)]