Who is everyone and what does everyone have to do with bales of hay littering your property? The hay is abandoned and on your land, it is yours. Have "everyone" call him and tell him to come get his hay.
Using them as fill is a good idea if you can move them.
He is not coming back for old hay. They are yours to do with what you want. He does not even remember leaving them there.
A bit of a nightmare situation.
Decades ago, Father in Law bought 500 acres. He's a "frugal" chap (read: cheap) and didn't want to pay for the place (he was a successful dentist, had plenty of cash flow)
Asked his sister & mother if they'd like to split the land (yes) so now it's three people each owning a third.
Mother passes, her third goes to father in law, his sister and his OTHER sister (who had nothing to do with it in the beginning)
That generation has now passed and there are (if I'm thinking correctly) 15 owners of the farm....the next generation AND some of it was given to a grandchild or three.
I saw an estate issue coming down at us.... so father in law put farm into family partnership and now there are shares. If you want to sell your shares, anyone can buy them. An outsider won't buy any because the farm is undivided.
Since I live here with my wife's cousin next door (in her deceased uncle's house) "they" are the others. "They" are FAMILY and I'm married into it..... so I feel a bit of deference to them although I'm the one that's actually keeping the place cut.
I've got an industrial backhoe so if the bales don't fall apart like the last ones I got rid of, I can move them. If they fall apart, I'll just destroy them in place (run over them with rotary cutter over several weeks/months and just dice them up)
If however, I can actually transport them then, I like the idea of using them as filler.
I don't think anyone is really going to say anything at this point in time. I think my case has been made by the farmer that he abandonded these bales a LONG time ago. Unfortunately, they were probably viable when I first wanted to get rid of them, now they're just disintegrating piles of junk wrapped in annoying plastic.
(and they DID call him to get his hay, he had probably triple the amount and this is what was finally left behind. Since he did make an effort to get what he took, wife and her cousin thought he'd come back and they didn't want to be responsible for it being gone)
I'm not as nice as they are!