We are not talking about all personal liberties. Lets stick to the topic of regulation of Psychoactive substances. You don't face problems of abuse and dependence on, say, guns or Tanks.

> If there was a drug that gave the user unimaginable euphoria or was guaranteed to kill them with a 50/50 chance should we do everything in our power to stop that? Especially for the young and impressionable?

We do have a system in place for controlling access to substances like Alcohol and Tobacco to minors.