Y'see, back in the day parents were not technically literate because the world was mid-societal shift. "Protect the children" (because parents are unable to) had some justification.
Today, basic computer literacy is a survival skill in the UK. The level of literacy needed to track your own kid is not that high (or expensive to rent).
If you are letting kids use tech you don't understand, and are not willing to invest the time/money to track yourself, that's a you problem. It shouldn't become a me problem.
As for "yeah but what about smart kids", I've got some bad news for you. They will always find a way around ANYTHING you set up.