Totally possible and something you can do already with digital ID. Checkout RealMe in New Zealand: https://www.govt.nz/browse/passports-citizenship-and-identity/proving-and-protecting-your-identity/use-realme-to-prove-your-identity-online/

A big issue is that many countries are a decade behind in implementing this system. They’re effectively asking the liquor store to check customers are 18, without government ID existing. So now the private sector is creating ID solutions to avoid legal liability. It’s a real mess.

Freedom - https://freedom.to/

A very powerful cross platform website/app blocker with a lifetime membership option. Works well for blocking multiple fediverse domains.

Perhaps you could write up the sort of guide you are talking about so I can see what you mean? I haven’t found people respond well to hitting them with much more than this upfront, and they get anxious when you don’t give them some specific recommendations to get started.

I wonder if I should make a fediverse animated gif or short mp4 that can be dropped in whenever needed.