The US has slowly been down this path with the whole banning of "EPHEDRA" and products with "EPHEDRA" in them.
There are some sites that used to sell prohormones and other supplements that no longer accept credit cards online. Its more or less a precautionary situation as a few sites have already been shut down in the past year.
Prohormones are gonna go the way off, well, I'd say steroids, but in my opinion, most prohormones will disappear. Steroids worked for the most part, many prohormones are just a supplemental companies marketing BS.
While i agree the supplemental industry has too many "LEGAL SCAM ARTISTS",
the problem is, the pharmaceutical industry isn't that far off the pace either with some of their known "SIDE EFFECTED" drugs and drugs that really dont do anything.
But the problem is, the US is slowly in the process of making more and more legislation on supplements.
The drug industry pays the US Gov. billions and billions of dollars a year in different regulations and so on.
For the most part, the supplemental industry (be it prohormones, protein, vitamins, etc) is an unregualted industry in the US. Meaning many "legal scam artists" and no money in the US govs pocket.
Believe you me, banning prohormones is just the beginning for them.