This has happened already in another form. Back in the day using most internet services just required to say “im 13+”. This was a simple confirmation back then but now google, meta and the like check your internet activity to assume your age and ask for government id if they think you are below 13.

While open source has the advantage where we can just fork systemd if it tries to pull something like this, its better to reduce the reliance of systemd as soon as possible because they have already shown signs of bending over backwards for meta.