Trespass rights denied

An Oakura (south of New Plymouth) man is refusing to allow people to cross his land. They have been hurling abuse at him and his kids and still attempting to cross the paddock. The man is living in a house caravan in the paddock they want to cross. It isn't clear why he has decided to refuse them access but here's the thing. They can walk around the paddock quite easily. But the angry abusers think they have the right to trespass on this man's land.