If you smoke weed you'll eat cheeseburgers?
Seriously, you want to know the difference between eating a cheeseburger and smoking weed? For me, I'd say the big one is that one seriously alters your brain and the other does not. Certainly eating cheeseburgers can become sad in and of itself if abused. But I consider it more sad that someone has to alter their brain to be happy. Comon that's pretty pathetic. Is life so bad you have to change the way your brain views it? And I don't see why you're all up in arms over it. It's not that far-fetched a position and probably one held by the majority of non-druggies and druggies.
Altering ones perception has been practiced for a long, long time. It's considered to be a natural part of the human condition.
Also, I personally enjoy eating carrots when I get high. Carrots are highly regarded as one of the most healthiest vegetables.