Questella
Peace, Love and all that good stuff
I don't have money for all that, it sounds very expensive. I've never thought of spraying them with the garden hose before though, do they hate that? At least I could do that when they came in the yard at us.If you think it's the dogs, can you use, like, plastic toy beartraps (no teeth!) or a recording of a machine gun set to play when the cross a certain invisible line? Dogs are fast learners. Your neighbors might be another story, but mayb you can rig some sort of water trap for them, with a hose soaking them if they cross that invisble line. Or if you can think of something less Home Alone-y, like filming your backyard and reporting it, or posting it online.
The invisible line could be a trip wire. You could put an automatic waterpistol (I hope those exist) in each bush set to spray when things are dumped there. The sky is not the limit, cuz we been to Mars.
Would be hilarious if they got soaked then ran back in the bastards house and got everything inside all wet. xD I'm sure the neighbors would be total wtf, but hey they're in my yard instead of being leashed. I was "watering the garden" (which we do have a garden to water.)