As a child I did most of those things offline. Hell, I bought tickets to R rated movies too. I know people who made fake ID's. I've been to parties where the hosting parents didn't care if we had a screwdriver before we were 21. No one went to jail. I could have bought cigs, too, but I was never interested. I had a few family members die horrible smoking related deaths. I'm not sure how this fits in with your analogy, but I dunno, beside accessing free adult material, it's probably easier for a child to do all of those things offline (but even then, lots of people have premium channels with ondemand nudity, too, so who can really say for sure?).
It's not a pass, it's just a reflection of the real world, which is not as rigid with rules and expectations as you are making it out to be. In any case, I'd rather the Internet remain as free, as in speech, as possible. If the cost of that is little Billy sees a nipple on a computer screen while daddy isn't watching, I think we'll be OK with the consequences. The consequences of the alternative is likely worse, and the article goes into this.