Bongstar-You have no evidence that pot is not as harmful as either tobacco or alcohol. An interesting side benefit of pot that is now being studied in detail, is the theory that prolonged use has a gradual effect in dulling cognitive and creativity
Bongstar also has no evidence that Pluto does not have a race of one-eyed pot-heads.
The theory that long term marijuana use impairs cognitive abilities will probably have substantial validity.
Still, we already know that alcohol does this and worse.
I disagree with bongstar in that I believe tabacco is not as harmful as pot (though tabacco is more physically addictive).
But his claim that alcohol is more dangerous to health is bourne out by currently known facts and just about every study on the topic.