RE: Truth is the Authority, Not 'Authorities' That Are the Truth
Carrying out some actions are not crimes, but the after effects can be considered crime or if the after effect can lead to injury of some people, then the action itself is crime. i am not a person of the law nor am i a law student but let us reason this.
If smoking some products will cause my mental health to be unstable there by if I carry out actions that will cause injury to people and in that state my actions are not considered crime because i am not in full control of my choices, then taking anything that will drive me to such a state of mental instability is a crime.
it is just like getting drunk and driving. if drunk drivers happens to cause casualties to themselves alone, perhaps that might be their original intentions, i wouldn't consider that a crime, but getting drunk and driving a school bus with kids off the bridge is a serious crime.
But, you're always the one doing it. You do the action, and you took a substance. Your choice, your responsibility. The actions of taking a substance comes with impressibility. It increases irresponsible behavior, and that makes one culpable for putting others in harm when not taking that responsibility seriously. Don't drive if you want to get wasted. If people did things voluntarily with concern for others, then there wouldn't be a need for government. When people lack self-control, other beg for an authority to impose external control on those who lack it.