I think that the "right" to pursue happiness should include anything you want, providing it doesn't hurt other people. What gives the government the right to control your body and what you do with it? If I hurt my own body, something that L. williamsi doesn't even do, why should I be punished and then have my peers pay for my incarceration? Whether it's T. pachanoi or M. hostillis, it just doesn't make sense.
While I see the point of not advertising the species, I don't support withholding information just because it could be used in a crime. Knowledge is free and should be available to anyone and censorship of that is terrible. Anyone who does their research could find like 3-4 psychoactive plants in their backyard, though... sometimes more.