I've been thinking about ZKP's a lot recently. Using them we could perhaps build interesting and useful decentralised social media protocols. You could create a union at your workplace where you make agreements with everyone but you only communicate directly with your closest colleagues. You could create anonymous groups of doctors in a certain region that listen to reggae three times a week that think it would be worth renovating the cafeteria.

It would be a better foundation for the social contract than tick tock videos. But you'd need to make ZKP understandable and interactive for the average user.