That's their choice. To me, it's not worth going jail over something that's 'harmless'. As long as it's banned - I plan to steer clear of it. There's a reason why the FDA decided a long time ago that marijuana is dangerous.
I'm just curious, are you aware why marijuana is illegal? The FDA didn't have anything to do with the ban in the first place. Racism/ignorance and the protection of corporate profits played a big role in it. Not to mention the corruption and greed within the government too as well.
Heck, sodomy is still illegal in some states.