Because every "study" done on marijuana to prove that it's bad for us has been proven to be bogus. The powers that be don't want us using marijuana and I guarantee their real reasons are not what they are telling you.

Here in Washington, law enforcement has come out in support of legalizing pot. Catching and incarcerating people for a bit of pot takes up a huge amount of law enforcement resources. A lot of these officers have admitted that even before the measure passed, they had not been enforcing the law - they have bigger fish to fry.