I talked to the neighbors a couple times, and they admit there is a problem, and they are on my side, but they don't want to get directly involved. .
THIS is one of the main reasons I moved to the country.
I understand your situation, in my case it was a college wrestler house and late parties/liquor bottles all over the street. Lots of hand wringing by neighbors, til the morning I found a half dozen bottles in my yard.
I found out that people that go to bed/pass out in the wee hours of the morning intensely dislike a big ugly old man BANGING on their door at 8 AM. After a nice loud chat, the named renter on the lease reined in his buddies and all was well for the duration of their lease...aside from the greasy looks I got from his sidekick for a few weeks.