Thanks Stephen, this is a great point and potentially the option with the greatest potential for impact!

My concern is that ‘advantages’ (e.g. productivity, agency) currently flow to those who either adopt the approach of privacy nihilism or have a deep set of technical skills.

If the collective happens at the group level, then do those groups become further marginalised? For example, I’d I opt out of sharing my health data is my medical care worse?

The most insidious example you cite is that of ‘platform-provide authentication’. It’s so convenient, yet so problematic. Previous attempts at more privacy-respecting alternatives have failed – perhaps, at heart, there’s a question about identity here?