I guess that would also include the states' rights to ban smoking mj in the privacy of one's home?
Of course.
My response is somewhat off-topic, but what the heck.
No, most Libertarians would support someone doing drugs...so long is it doesn't affect anyone else. For example, just as you can't drive drunk or show up to work drunk, you can't drive drunk or show up to work high. Face it the so-called War on Drugs is a dismal failure. My guess is that in the near future a state vote on legalizing marijuana would pass in a majority of states, just as sodomy would. Personally, I could care less if my neighbor engages in sodomy and smokes pot...so long as he isn't hurting anyone else with his behavior. I just don't want to know about it.
Of course, there are those of you that make the argument that the person will harm himself. People do things to harm themselves all the time. Smoking, drinking, sex w/o condoms, etc. When should the state regulate such behavior and when does it become personal responsibility? I'm of the opinion that government attempts to regulate personal responsibility intevitably fails.
Protect me from my neighbor that may try to steal from me or kill me, protect me from terrorists that may try to kill me, but do not try to protect me from myself. It's my life.