Gross. We had one of those in our neighborhood and the landlords hands were tied up in "the rent is paid", coupled with a bad lease agreement. Anyway, 4 area households made a plan to confront the tenants/squatters, till everyone felt unwelcome. It wasn't pretty and my car got scratched up. But I'm a better brat and do have some mighty fine directional hi beam lights. 

Sorry this happened to your place. 

People, don't do drugs. 
Your better off without them.