Ten platforms removed nearly 5 million young accounts under Australia's under-16 ban

Nearly 5 million removed accounts ^[8] and seven in 10 children keeping the accounts they already had ^[9] can both be true. The two figures count different objects. A deletion is an action on a platform's own records; retention is an outcome measured on children. A child with three accounts can lose two and stay logged in to the third. The IEEE Spectrum account does not report how many Australians are under 16, so there is no denominator for the 5 million.

The parental survey measures parents. In the YouGov figures cited in Time, 61 percent of parents of children 16 and younger reported positive changes, among them more face-to-face interaction and improved parent-child relationships ^[10]. Parents noticed those changes at home. It is not a measured change in hours of use, and it does not come from the children the law restricts. Three in five Australians surveyed called the ban effective ^[11]. Most of the people answering that question fall outside the age range it covers.

The research behind the policy is associative. The study in Nature Human Behaviour cited by IEEE Spectrum found that adolescents who begin using social media at an early age tend to have significantly lower academic performance ^[12]. Early starters differ from late starters in household, school and supervision, and any of those can move grades on its own. The Australian law happens to create a stronger design than the one that motivated it: a whole-population change in access with a hard birth-date cutoff. A discontinuity like that can support a causal estimate, if someone measures the cohorts on either side of it.

The compliance question turns on which checks are permitted. The legislation names government-issued identification, biometric or facial age estimation, behavioural or inference algorithms, and self-declaration with optional checks ^[6]. Those four fail in different ways. Self-declaration is the one teenagers defeated by entering incorrect age information, and the same study describes children using free VPNs to get around checks, some of those VPNs with questionable data-collection practices ^[13][14]. What platforms owe is "reasonable steps" ^[4].

The rule covers account-holding. Under-16s can still see publicly available posts and videos without logging in; what they cannot do is comment or post ^[5]. Human rights organisations and digital freedom groups have argued the ban limits young people's freedom of expression and access to useful information, and could contribute to social isolation and the loss of support networks among marginalised youth ^[15].

The study's figure also means about three in 10 children did not keep their existing accounts ^[18]. Three in 10 is movement in a population where most children kept access. The clearest effect so far is on product design: Snapchat is moving toward a friends-only experience for 13- to 15-year-olds ^[16], and the law is prompting purpose-built online spaces for children under 16 ^[17].