If I had 2 children, I would move as fast as I could.
I doubt very much that you can do anything. People will do what they want to do and they have that right if they aren't hurting anyone. If you DO feel hurt by someone's personal behaviour then you may need to do a few things to help yourself.
This particular forum is for addicts/substance abusers who want to stop abusing.
IF it was my house~ I'd keep calling the police when you see wrong being done. Then I'd stop all.concern for these addicts and worry about my own 2 kids...and get them OUT of that neighborhood.