If the law creates this new API, nobody will be able to get away without leaking PII to the web (I think it will have a javascript API). 1970 jan 1 identifies *nix users, 1900 jan 1, even an "unset" will leak info on people, etc. entropy and shit. Websites will also try to use the API. One could set the function to crash JS, or disable all JS, but that already breaks 90% of the web. One could also: either not install userdb (like I do), or install a non-systemd linux, but those still will leak "unset" or "API disabled".
There's no getting away from this, it really is the law that we should push back against. Unfortunately it's a fight currently only Americans and Brazilians can participate in properly. Donations won't work well, govts these days often clamp down on NGOs because they often get money internationally, and therefore, they are "foreign interference" etc.