That is not correct. In law making the is a concept of standards VS. Rules - look it up. "you can not serve explicit erotica material to people under the age

That is not correct. In law making the is a concept of standards VS. Rules - look it up. "you can not serve explicit erotica material to people under the age of 18" is very much a rule. It is super easy to asses whether you do it. The law should not mandate how to comply. Law makers do not care if you refrain from pressing the speeder or drive an under powered car.