Along the lines of what soonerwings said earlier... neighbors selling drugs doesn't harm you and isn't any of your business. The only way it affects you in any way is that there is more traffic going to and from their house, which isn't really your business either, and would happen whether they were selling puppies or heroin. People disturbing you with loud music, trespassing and leaving trash on your property, putting you and your family in danger with their driving, etc., are problems that are separate and distinct from simply selling drugs, and there are ways of dealing with them. The hypothetical issues of the dangers of impaired driving and dangerous drug manufacturing that could put you in danger are also separate and distinct from people simply engaging in voluntary exchange, and if those things were to occur, there are ways of defending yourself from them. But don't conflate these things with simply selling drugs. It is really a reach to assume that since you think someone is selling drugs, they must also be engaged in dangerous drug manufacturing processes. A very low percentage of dealers also manufacture. As far as the comments about drug related drive-bys going on in upper class white neighborhoods, it sounds like some of y'all are getting your knowledge of the drug trade from movies like "Scarface." In my experience, drug dealers usually keep a low profile, and go out of their way to avoid causing drama with the neighbors and whatnot, for obvious reasons.
Sounds to me like the OP just needs to go have a chat with the folks at this house about the issues that he has with them and the folks who visit them.
This is the problem with lawyers, they think too much like lawyers. If I needed a defense attorney I'd call you. If I needed my neighborhood problems cleaned up I'd probably call the Orkin man instead....