As a libertarian I couldn't possibly let the government stop citizens from doing what they want in their own home. But libertarians seem to fall into the trap of arguing that marijuana isn't bad for you. This isn't true and takes the debate away from a discussion about the role of government.
As a fellow libertarian I agree that drugs should be completely legalized and regulated by the market. As a registered nurse and marijuana advocate I have to ask how is marijuana bad for you? There is some evidence that it's not good for adolescent minds and people who are genetically predisposed to schizophrenia, however I don't know of any medication that doesn't have side effects in some populations. There have even been studies that it is good for asthma, emphysema, and prevents lung cancer.
I agree with this wholeheartedly. What comes to mind is Gary Johnson pretending to have a heart attack on TV when someone told him that cannabis usage increases the risk of said heart attack.... which is true. It's touted as some miracle drug which cures cancer, increases metabolism, and according to Joe Rogan "Makes you a better person." Coming from someone who's smoked A LOT of weed in their life, it can be a bad thing. Just like anything else in this world.