While I agree with your overall position in general, the line "most teenagers probably kno(w) more than their parents" is an old paradigm. True for the boomers but not now that they`re parents.
Since the 60's it's been more like willful blindness from the old school 'command and control' conservatives.
Just look at the comments to see the dichotomy of opinions between those with first hand knowledge and those parroting the Reagan right.