If it were me, I'd film the drug busts you can see from inside your house with your cellphone camera, THEN send those video clips to your local news media. Sometimes, public attention like that is the only way to get the attention of politicians (your local state governor, city mayor, police chief) and force their hand; if they don't do something, the public scrutiny will follow which they don't want to deal with.

Bad neighbors are like the Herpes virus; you can treat it but it will always come back when you're stressed out.