I don't care about the trailer trash who own the dogs--if I get attacked, I'm suing the land owner. It's their responsibility and their liability, and I'm saying that as both a property owner and a dog owner. You might not be able to get blood from a turnip, but if it gets down to it, I'm betting my attorney can force the sale of the land to cover their liability.
FWIW, if a landlord has ever told you "no big dogs" when you tried to rent, this is why--their insurance won't cover the liability.
We are on the same sheet of music.