the gateway drug argument is a classical logical fallacy, and the way that fallacy is being bludgeoned here by nancy grace (the demagogue) is absolutely classic fox news. my head shakes every time.

if a person does hard drugs, they began with soft drugs
x does soft drugs
therefore, x will "graduate" to hard drugs

most people that have finished grade ten can intuitively see the flaw in that logic. if they can't, they probably wouldn't get through first year. it's literally logic 101.

http://www.youtube.com/watch?v=hbc-Sbx5ckA