Total firetruckin bullshit!
Move to the country and buy enough land that you can't be surrounded by subdivision in 15 years. That's my plan.
ANY dog on my property gets lead poisoning. Missouri law: You're afraid for your life, you have a right to defend yourself; ANY dog can attack and kill. I recently had some trashy people move in across the street, exact same scenario. Renters don't give two $hits. If they buy it, then they're looking for stability and will probably respect the place. Talk to the landlord, and document document document.
I would NOT pick up the trash and toss it back where it came from. That can be made to look like YOU are the litterer. Call the city. Enough complaints...squeeky wheel syndrome.
And if I caught a SINGLE kid in my yard on my property, and especially on my car, without my permission, I'd have them by their grungy little neck back at mom n' dad's with VERY clear wordage indicating my wishes and my legal rights. If that kid got hurt on your property, YOU CAN and probably WILL be held liable!!