What to do about bad tenant neighbors!?

[Cody F.]

We moved to a gated community thinking it would be safe, and we would have tons of good neighbors but we overlooked that there is a small house next door that is brown and sort of blends in with the scenery so we didn't let that dictate our buying choice.  The people who used to live there were a small family with a traveling nurse as the head of the household.  They were decent neighbors BUT,

When they moved out, they were replaced with some people that look to be straight from the ghetto. I'm talking white-T's down to their knees, sagging jeans, and a pit-bull in the front yard.  They now have 3 busted up old cars in the driveway and the pit bull in the front yard that barks all the time.  The other day I saw them drinking beer in the front yard with like a group of 4 white-T's 

I don't like it because we paid a high price to live here, and it's a gated community so a higher caliber of people should be common here. Now I have to drive past this eye-sore every day and worry about my home getting broken into when I leave. It seems like they're always there, which makes sense because the owner said the tenant is on disability so they likely don't work.  He also said that the tenant plans to be there for a long time. JUST GREAT!!! 

I dug up some clues on the owner of the property, he's an older gentleman who used to live in the property years ago.  It was one of the first properties built in the community so it's grandfathered in which is how they get away with having a dirt driveway.  They really just park anywhere in the yard.  I have complained to the owner but he says the tenants aren't doing anything wrong, and if they are, that I should go to the Residential association to have them handle it. I asked if he had a pet policy on the lease, and he doesn't. He sounded like he might not even have a lease agreement because he sounded confused when I asked him. 

I'm trying to figure out what options I have.  What buttons I can press, or levers I can pull to work on the situation.