This is not to stop children from doing that. This is primarily to deanonymise as many people as possible, before the next steps come into force (scanning all files and messages on the every Internet - connected devices, hardware attestation of all the internet - connected devices, etc)
So when the citizens inevitably start protesting against the oppression, it's easier to subdue them.
So when the citizens inevitably start protesting against the oppression, it's easier to subdue them.