The same reason Henry Anslinger did. Dane is one of those who believes everything in the movie "Reefer Madness" as fact writ in stone. For whatever idiotic reason, he also believes that the LP has drugs as its only issue.
One track mind. Another thing you will notice is constant attempt to derail whatever topic is currently in the thread, and shift it to the libertarian/drugs issue. Second Amendment, Taxes, the rightful role of law enforcement in society, ... he doesn't care. To him, it's all about the drugs.
He is a former, and maybe present user of illict substances. He claims to have "forgotten" the details of his involvement in distribution and dealing in those substances. He has "Hillary" recall on those things. Ask him if you want a laugh.