There's no law that says you have to volunteer or help neighbors but you do have to follow rules at landmarks. But if nobody did any of these, everyone would have to do everything by themselves and nobody would work as a team to get things done. People would be really rude though if no ody did any of these things. You would also be breaking the law and would be a bad person and maybe have to pay a fine for not following the no littering or no feeding the animals rules.