I don't think that all Libertarians are dopers but more as Ayn Rand has said that they have failed at teaching what they stand for mostly because they can't agree among themselves.
Many (Most) of us see the drug issue as a distortion (and frankly a non-issue) perpetrated by the GOP-faithful to discredit and divert attention away from the concepts of limited government, individual responsibility, and maximum personal freedom. Such concepts are antithetic to the theocrats and power brokers that populate the GOP hierarchy.
After watching the reaction to the results of the last election, it's obvious that the GOP does not see the close races in 2000 and '04 and the loss of the House and Senate as a result of moving away from their conservative base, but because they have not moved far enough to the left. I expect to see the GOP becoming more liberal, more big spending, more big government solutions to every conceivable problem. And as more conservatives realize that they are being sacrificed and more libertarians look for other choices, a huge gap opens on the right. A gap begging for another Perot-type solution. I'll be the first to forcast another 40 years wandering in the desert for the GOP.
Thanks for the discussion.