I don't think all code should have to come with a warning label.
I'm 17 years old, falling into your teen category, and there is no way I would ever run that code in a production environment - just by looking at it I can tell it's unfit.
You use Hacker News, you don't fall in to my teen category. :) (That's a compliment.)
Have a look at some of the sites here if you have time: rev.iew.me/users & you'll see what I mean.
For the record, I agree, code shouldn't have to come with a warning label; but I have seen many a site taken taken down by similarly bad code. I do my very best to help these youngsters where I can, because I was in their position once too. (Hence why I am here, to learn more and be able to offer more help to those who don't know so much.)
In my experience (still a teen...) it's the rule until proven otherwise. I mean just by being a teen many people assume you have some level of technical knowledge, but it doesn't go beyond helping people with setting up their computers and phones...anything like programming is like an "oh, really?" to a "oh, wow [you can actually do it]!" thing.
Well, to be specific, that was the case for me from 13 to 16, then I started prefacing that with "I'm majoring in computer science" and then the discrimination started to go away.
I'm 17 years old, falling into your teen category, and there is no way I would ever run that code in a production environment - just by looking at it I can tell it's unfit.