The video does not show any previous interactions with the cop so we don't know why the cop may have been frustrated. However the kids did not have permission to rode the land. its private property and the cop let them off easy. This is not harassment in any way. were it my property, I would not want someone riding without permission. the liability alone would make me fence it off. And for the record, I have nothing against off road riders, I ride a wr250f myself. its everyone responsibility to respect others property, don't have permission, stay off it.