It is illegal to trespass, but you can also acquire the property you trespass upon by adverse possession. If you can trespass for 20 years (varies by jurisdict

It is illegal to trespass, but you can also acquire the property you trespass upon by adverse possession. If you can trespass for 20 years (varies by jurisdiction) without getting ejected, it's legal. And you now own the property. If you don't enforce a trademark, it is void. There are statutes of limitations on a lot of crimes and torts, including those involving violence. So there is quite a lot of precedent involved in unenforced, flagrantly-violated laws becoming void. One way around that is to elect government attorneys that will prosecute those laws, and government cops that will investigate suspected violations of those laws.