Yeah, never believe the crap the government tells you (about anything really).
The only reason that they care so much is because of money. They lose money every year on the stuff, so they use scare tactics to try to get people not to use it.
Of course there are some drugs that do harm to you. These are like Herion, Meth, MDMA, etc. But most of the other ones, DON'T do harm to you.
Also, is Marijuana addictive, Yobumtin?