I was not agreeing with your comment that I was policing you.
As for my personal beliefs, like everything in life, it's a balance. Do I want society telling me I can't smoke weed, no. In fact, I don't really want society telling me what to do, period.
On the other hand, we all have to live together, and so we all need to agree on some rules to live by to protect each other and society at large. There are some obvious rules, like let's all try not to murder and rape each other.
Should drugs be illegal? I don't know. What impact would legalization have on our society? Well, that's the question isn't it? And the debate rages on.