That must literally stink for you, but wind swirls. Do it anyway then collect the pollen and go for a drive around their property line til the wind is favorable. Its not hard. Just one male plant would probably wreck a good portion of what they are doing. As you said, plant hemp too so the seeds are worthless to them.I’ve joked about that. But for me the wind blows from them to us. I would need to be on the other side of them to make it work.
Just telling them you're going to do it may make them leave too. Or make them do something crazy. Your call, but explaining why they have seeds would force a hand. The crop would be worth a lot less.