Questions on J. S. Mill on Justice

1. According to Mill, why should we obey the law, and how do we determine if a law is unjust?
2. Why is social utility best promoted by allowing citizens as much liberty as possible?
3. What is the only reason that justifies the State's limiting someone's liberty by law?
4. What can a society justifiably do to try to exercise control over citizens whose behavior is offensive or self-destructive?
5. Why shouldn't the State be able to prohibit by law behavior that would profoundly and unavoidably offend the vast majority of members of a society (e.g., bestiality or corpse mutilation on a bus)?