Why do people downvote the obvious answers? What they want to hear is "run to the police and council, don't attack them because we wouldn't do that so you can't possibly do that". The only real way to fully get rid of them is to let them know a mad man or mad woman stays there and isn't taking that shite. Worked for Mags Hayney back in the day, she cleared all the junkies and pedos out the Raploch.