"without a valid reason" is doing a lot of heavy lifting here. Not only would this idea be impractical and highly subjective, determining what a valid reason is, is the same problem as defining the Law in the first place.

Can you insult someone? Can you say something wrong that you thought was right ("the lion cage is locked") that someone is injured from? What is their duties in checking the info they get is correct? Is there a min wage or not? What value is it? Does it change on city or state? Can under-age people sign contracts? Can they vote?

Obviously we need the law in any practical world.