This is a fight you are going to lose. A better approach would be to put your energy into making sure the used methods are _reasonable_. We don't require ever

This is a fight you are going to lose. A better approach would be to put your energy into making sure the used methods are _reasonable_. We don't require every FSK16 game sail to register the buyers name, age, contact info on physical checkouts etc. In most countries a law requiring that would be seen as excessive and in some places unconstitutional. Instead it's fine to visually look at a id, and if it "obvious" they are adult (e.g. very old person) we don't even require that. And thats fine. Because we don't need a perfect prevention we just need something which helps parents parent "a bit" and helps "a bit" in cases where parents don't parent. If everyone fight "all age check solutions" the chance that they get fully ignored and some horrible shit gets passed into law is very high. If everyone fighting also provides a alternative and strict guidelines about what is and isn't acceptable in their opinion there is a chance for reasonable solutions being implemented instead. (Like e.g. put a age gate header into http responses, like "min-audience-age: region=US, age=123; region=EU, age=456", say OS must have a API where you pass that in and they say yes/no for that account, do NOT require any crypto, signing etc. This is not fraud prevention but parenting helper. The OS then can store `18+|age` internally and have some integrations with country specific age verification services (it must only store 18+|birthday and only birthday iff <18, I guess for US 21). But there is no need to prevent anyone from changing this value with e.g. windows regestry changes, except if it's a child account. So require any widely _sold_ OS to have a parent controls/child account functionality. But really any solution which effectively requires mass surveillance, exclude hobby OS or similar, require some clever signing scheme involving device attestation etc. is VERY excessive and unneeded.