🔊 Question about the Nostr protocol for admistrating organizations

To all Nostr masters out there 🔊 — especially organizations and companies —

A friend of mine raised an important question:

With France's age verification law for social media about to pass, we may soon see a wave of users refusing to provide their ID migrating to alternative platforms.

Here's the question regarding Nostr:

Since a Nostr private key is immutable and unique, how can accounts be shared without compromising security? In other words, how do you prevent someone with access to a shared account from taking full control of it?

Thanks in advance!

https://stacker.news/items/1463462