Alright.
The argument to combat drugs in the first place is because you're indirectly, but effectively, combatting drug-related crimes, such as theft. Why is theft so common among junkies? Here's why: several of these drugs are extremely addictive and also neuro-toxic, they cloud your decision making and you need to take more and more of the drug (that's what an addiction does) so you need the money to get the drug, but your capacities to make money are reduced by the drug itself (you did drugs yesterday, you feel screwed up in the morning, don't go to work, get fired, now you have two problems).
There's other stuff specific for different drugs. Many bankers are known to use cocaine, which makes them take risks with normal people's savings. http://articles.businessinsider.com/2011-09-12/wall_street/30155606_1_addiction-cocaine-drug-and-alcohol
It could very well have contributed to the crisis.
Heroin is often injected and people who use heroin in groups, start - again because their judgment is clouded - to overlook the risks involved in exchanging needles, which is what they often do.
These harms indeed "outweigh" whatever rights 'responsible drug users' might have.
Then there's the question why I would restrict my approach to supply side and not extend it to demand. The reason of that is many people who get caught, are just having a little innocent fun. Trying out stuff. I'm not interested in seeing my prisons filled with young students who are in a phase of their lives where trying out stuff is very much "what they do", which is why I target what I believe to be the more dangerous side in this: the vendors and producers.
The exception for LSD then, well, I believe Jim Morrison was inspired by LSD and if I'm not mistaken the name of his band, "The Doors", was a reference to the poet Blake who used the line "if the doors to perception are cleansed, anything would appear to man as it is, infinite" (I don't remember the exact wording) an The Doors tried to "open" this door with LSD. Frankly, I didn't think they did a bad job, but it wasn't LSD that finally killed Morrison, but heroine.
Then there's the exception for alcohol, I don't think it's feasible to ban it. If it would be, I would be all down for it. Particularly the many cases of domestic violence and car accidents that occur under the influence of alcohol is still way too high. But it's one of the vices I believe we have to learn with in our society because it's so widespread. Drugs is another matter. (Dalrymple, I believe, argues this well.)
Finally, there is the question of freedom and objective that President Eden addresses. "You can be wherever you want, but that doesn't mean you get to force that on someone else... and sorry if that basically invalidates the side you're on, if your side requires forcing it on someone else. Well, I'm not sorry, really, but you get the drift."
This is not the way I interpret a free society. I believe that with a free society comes plane simple freedom, but much more than that, the freedom to define exactly what is meant by freedom. One of the characteristics of Dutch society, for example, is extremely restricted gun-ownership. Now I immediately admit (being a large proponent of this restriction and in fact not finding it to go far enough) that in that sense, I restrict people's freedom. However, the risk of walking on the street and getting into some kind of armed dispute could get me killed. I don't have a lot of freedom after that, do I? So freedom is obviously a limited, restricted thing. In a democracy, the people decide together exactly which freedoms are most worthy of pursuit, and which freedoms come at too high a price for the collective.
I aspire, just as much as PE or Yonni, or anybody else does, for my society to be truly free, but I don't believe that getting high is one of the valuable freedoms that I cherish if I set it off against the downsides of it I mentioned above, downsides which could also target me. The bankers so collectively screwing up during the crisis, to some extent to the cocaine culture in the banking sector (they need to be awake all the time, because they have so much work and cocaine effectively gives you a boost, I don't make this stuff up), is what loaded a large debt onto Dutch tax payers' shoulders, since we had to save some of our banks from collapsing. I don't want my bankers on drugs. I don't want my neighbor on heroine and I don't want my bus driver on vodka, but I don't see how I'm restricting any of them in their real freedom in demanding that.
Does that answer your question?