LOTS of Marijuana not harmless.

http://www.reuters.com/article/topNe...edName=topNews

They're looking into tests on more short-term and mild usage of marijuana.

The men had smoked at least five marijuana cigarettes daily for on average 20 years.

That's quite a bit of pot. I can't say I haven't smoked that much in a day before, but daily? That's dedication.

Well no shit they're going to be retarded. 5 joints daily for 20 years is a little overboard. Abusing anything that much is going to have negative consequences.

True. Even drinking too much water can kill you.

Breathing too much air kills me.

If to much of a good thing is bad, is to much of a bad thing good?

Nope, not a biconditional.