Plus, if they've got the balls to break in the house, what's to prevent them from coming over here?
Huh?!? I'm always amazed at the ease of fear-mongering that some people come to. The squatter didn't break into an occupied home (assuming he broke in at all), he occupied a vacant abandoned home. At least he's trying to publicly live there and make it his, which may help reduce more malicious squatters from occupying that home and using it for criminal purposes (this has happened with abandoned homes in Las Vegas, NV).
At least now the neighbour can claim a 100% occupancy rate in the neighbourhood, and not one where there exists an abandoned, foreclosed home.