There are plenty of so called "research" companies that do get their "samples" through legal channels and I would think that this act was a way to monitor and tax them so that they are no different than say, tobacco farms and such! (The only difference being that they originate outside the country and are administered here in the US.)
Overall, any sane method will be hijacked by the so called "moral police" and will end up being used for something altogether different than what it was proposed to be. One way to deal with this would be to get the state out of your personal life and body!
So here is the model: see something you feel uncomfortable dealing with! Right away, make it illegal and crusade against it, in the form of war on drugs and so forth. What is really happening is a war on poverty and a way to dispense of the poor by making them slaves in private jails and institutions!
The USA is worse than any other place on this planet when it comes to its draconian laws and regulations.