We also have to consider that "children" covers anywhere from birth to approximately 18 years old.
It is reasonable to expect a parent or their proxy (e.g. caregivers and teachers) to moderate access to the Internet in the early years. Yet older children and teenagers gradually gain more independence. For example: they are able to go places on their own, get their own phone, etc.. In the physical world, we have laws that recognize this, things like forbidding the sale of alcohol and tobacco to minors. Responsibility is placed on the vendor to check identification when selling such products and the customer's age is suspect. It would be absurd to place responsibility on parents in this case since the most a parent can do is educate their child.
Now I understand the Internet poses problems when it comes to similar transactions. For face to face transactions, appearing old enough is often sufficient (perhaps with a buffer to avoid liability) for access without presenting identification. While it isn't truly anonymous, there are cases where it can be reasonably anonymous. Unfortunately, transactions are mediated by machines on the Internet. You cannot make any assumptions about the other person. Making matters worse: it is extraordinarily difficult to do age verification without disclosing identify information, and to do so in a manner that is easily recorded. Whether that information is provided directly or through a third party is a moot point. It is still being provided.
I don't know how we go about solving this problem, but I do know two things:
- Placing all responsibility into the hands of parents is absurd, and would ultimately prove harmful to adolescents. It is creating a nanny-state where the nanny is the parent. The youth would be unable to gradually gain independence, nor develop an identity independent of their parents' whims.
- We live in a world which is eager to age-gate things that should not be. Sometimes this is for semi-legitimate reasons due to how the Internet is structured. For example: there is no good reasons why children and youth cannot participate in things like discussion forums, but those forums definitely cannot look like the "social media" we have today. Other times it is for despicable reasons, such as making value based judgements based upon ideology. (The left and right are both guilty of this.)