In an age before the internet was widely available in the home I would just stay up late, which was 11pm back in those days, and watch the "ten minute freeview"

In an age before the internet was widely available in the home I would just stay up late, which was 11pm back in those days, and watch the "ten minute freeview" on "television X" where there was about a 33% chance that you might spy a woman's lady bits for about 5 seconds. Realistically, kids will circumvent almost anything you put in place if they're interested enough in what they're trying to achieve.