The reason why you are seeing these families not getting in trouble, is because they are not giving the feds the opportunity or evidence to convict them of a crime.

Do you realize that the Feds go on for years building up evidence against someone to convict them of stuff? They do not work like your local barney fife guy patrolling the street. It sometimes takes years for them to get enough evidence to take guys down. It doesn't happen overnight. The Feds want so much evidence that its a slam dunk case when all is said and done.

Also people learn how to avoid prosecution over time. What you are seeing is proof that people in power are becoming smarter. Its a cat and mouse game plain and simple.