No, alon, I was expressing my frustration with some people's here complete denial of well-grounded facts. If you told a reasonable person that the Earth is round, they wouldn't ask you for a study to prove it. The same goes to something like the potential for dependence on LSD (or rather, lack thereof).
No, if you told a reasonable person that the Earth is round, he would ask you to show him proof, to which you can provide a globe amongst all sorts of other evidence.
Now, to someone who has never consumed drugs before, the dependence of various drugs is not immediately obvious. You have not provided data, you have only provided claims. You cited two references on the previous page, the first of which is a simple opinion piece with no bibliography, the latter is an article that is a good primer on the issue, but doesn't really provide any solid data for your claims.
That's okay, I have found some data for you:
http://www.umbrellasociety.ca/web/files/u1/Comp_epidemiology_addiction.pdfThis seems like the only solid piece of statistics done on addictiveness of a wide range of drugs, with a relatively large sample size (n~8000). Every paper that quotes capture ratio figures seems to cite this paper. Keep in mind that the dataset is from 1990-1992 surveys. The question is, do the data justify your claims?
Dependence (%)
Alcohol: 15.4 +/- 0.7
Cannabis: 9.1 +/- 0.7
Psychedelics: 4.9 +/- 0.7
Heroin: 23.1 +/- 5.6
Cocain: 16.7 +/- 1.5
At a glance, it appears they do. But we dig a little deeper:
Dependence:
 & 16.5 \pm 1.3 & 16.4 \pm 1.1 & 16.4 \pm 1.0 & 10.7 \pm 1.1 & 15.4 \pm 0.7<br />\\ \text{cannabis}\,(n\sim 4000) & 15.3 \pm 2.3 & 8.1 \pm 0.7 & 8.5 \pm 1.3 & 3.1 \pm 1.5 & 9.1 \pm 0.7<br />\\ \text{psychedelics}\,(n\sim 850) & 8.8 \pm 2.5 & 4.5 \pm 1.3 & 3.8 \pm 1.1 & 0.6 \pm 0.6 & 4.9 \pm 0.7<br />\\ \text{heroin}\, (n\sim 120) & 20.1 \pm 10.1 & 15.0 \pm 6.0 & 31.8 \pm 10.7 & 7.7 \pm 7.7 & 23.1 \pm 5.6<br />\\ \text{cocaine}\, (n\sim 1300) & 24.5 \pm 4.8 & 15.5 \pm 1.9 & 15.3 \pm 2.4 & 11.8 \pm 6.0 & 16.7 \pm 1.5<br />\end{array}<br />)
These are some of the conclusions we can draw:
- cannabis, when consumed by youths, is as addictive as alcohol, and as addictive as cocaine later in life
- psychedelics, when consumed by youths, is as addictive as alcohol later in life
The effect of availability on dependence cannot be deduced from data here, so that is a source of unknown uncertainty for illicit drugs. The data is also 10 years old, and recent trends are not reflected.
From the data above,
- We cannot say cannabis and psychedelics are safer than alcohol by an order of magnitude.
- We are not sure if cannabis and psychedelics are necessarily less addictive than alcohol, at least not at some age groups and definitely not across different age groups.
- The 'facts' about cannabis and psychedelics are not necessarily well-grounded or well-documented. There appears to be very few sources of data available.
The only solid conclusion we can draw, I think, is that cannabis and psychedelics are not more addictive than alcohol, and alcohol isn't more addictive than cocaine and heroin.