Everyone discusses better parenting all the time. But some people forget what it's like being a kid, circumventing blocking systems is trivial if you're motivated, and even if they weren't, a cheap phone costs $80 and kids are very willing to share their old devices.
I had a second phone line installed at my parents house so I could have dialup Internet of my own, so I grew up on the Internet through the twilight of the 'golden years'. My parents had no idea what was going on, I was the only one in the household that knew anything much about computers and the Internet.
rotten.com was an interesting education.
I had a good upbringing and generally attentive parents on the whole, though, so I was already a well balanced young human.
Kids can also choose to disobey parents and play on train tracks or jump off cliffs or a million other dangerous things. Either you leave it to the parents or you end up spying on every single action they take.