They will continue to obsess on your perceived reticence until you can leave the hood. OR, you can invite them over for beers and burgers and hob-nob with the hayseeds while enjoying some loud and obnoxious diversions and the minute your back is turned, they will flush concrete down your toilet and poison your goldfish for a little laugh later on.
Dude, you ARE getting f'd on all sides. Anyway, next time that prick throws his hillbilly left overs on your yard, you should send it to him, C.O.D., with something on the outside of the box indicating it is some sort of "prize claim". You should definitely see less scraps in the future. As far as the tractor reject goes, I'm not sure what to say. Are you open to arson? You could easily toss the evidence on your neighbors side of the fence, and then call the police to report their suspicious behavior.
Heres to hoping those bastards die!