I think most of know the difference between right and wrong, legal and illegal. Some skirt the edges all the time hoping to get away with things that are shady. Why?

You are babbling. Remember, "knowing good and evil" was the serpent's lie to Eve. Humans are actually lousy at judging good and evil. "Legal and illegal" have nothing to do with "right and wrong". Governments always pile on laws and restrictions until the only way an honest man can earn a living is by smuggling.

cause they like to get away with stuff they shouldnt