If you were evil there is something you could do. Adults do not hear high pitch sounds. You could do similar to what I do when idiots let their dogs crap on my yard and leave it.
A 10 watt warbling sound generator that varies from 25 Khz to 35Khz is aimed out there. It has 4 horn tweaters that can be aimed to cover the area. It's very directional so when the dogs enter the cone of pain they back away and have to be picked up squirming as they try to escape the sound.
Most quickly give up and walk elsewhere.
I do not leave it long as the rabbits and squirrels also hate it.