Had there been a law licensing their sale, and use ONLY within licensed salons with people certified to have trained with dealing with people on bad trips then these recent cannibal attacks could've been avoided.
Had it already been completely illegal these people would've gone to the black market or would've found some potentially even worse alternative, and then the same thing would've happened, just that the government wouldn't have collected any sales tax on the transaction.
Those kids in Florida could've just had a nasty, bad trip, and been restrained by professionals until they came down, and then came out much wiser from the experience. Instead they not only wound up dead but other people died as a result of their insanity.
Interestingly it turned out the bath salts cannibal wasn't even on bath salts. All they found was marijuana, but science shows that marijuana doesn't lead to this sort of behavior, so the likely conclusion is that he took a drug they can't test for yet.
The drug war is like a game of whack-a-mole, ban one drug, people come up with something else, ban that, once again people come up with something else.
If we classified drugs based on the science on how dangerous they were we could keep the really dangerous ones in a secure, supervised setting where professionals can prevent harm to the users or others.

