Echoing Pwent's thoughts from earlier, militant potheads are monumentally stupid and useless which is my biggest problem with it. Of course, everything in moderation, but there's a difference between drinking water in moderation and smoking pot. Despite what potheads will lead you to believe, it's addictive. There doesn't have to be anything physically addictive in it for it to be addictive. There are multiple, provable negative effects that come along with it, despite how many times people tell you it's "harmless." It's objectively not. Pothead culture should be discouraged by any means necessary.
The same goes for a lot of the other things you listed. You should be discouraged from being extremely overweight. You should be discouraged from sitting inside and playing video games all day.
Can pot be *addictive*? Of course. But so can most things. Alcohol, food, sex, video games, politics, exercise, caffeine, sugar, candy, adrenaline, power - all of which can be destructive with unbridled restraint.
While I agree with the general nature of your post, the difference is that I don't think we need a bloated government that needs to regulate personal behavior for those that can control themselves.
I know plenty of successful people who smoke a joint on the weekends, or, like myself, maybe once every couple months - in the same way that (I presume) you can have a drink, eat a candy bar, or have a heart-disease-inducing double-bacon-cheeseburger once in a while.
As you stated, people should not be encouraged to gorge themselves with fast food, but that doesn't mean everyone does it, nor does it imply that seeing a McDonald's on every corner is *encouraging* people to die of heart failure. *Most* people can enjoy a hamburger every now and then without a state appointed babysitter.
I think you and Pwent are losing sight of the idea that maybe 'militant potheads' are more concerned with the eradication of personal freedoms moreso than just wanting to get stoned. After all, they smoke whether it's legal or not.