My first thought was birds, so perhaps I might turn that around and recommend a reciprocal investigation. Because only on further reflection did I see the darker side, and realise the likes of Google do not get to make the “oh-we-didn’t-realise-that” argument.

The nice thing about this new Google technology is that it makes it easier to fleece a flock of users, while making the users think they have privacy.

Of course Google does not think its customers are sheep. Google thinks its users are sheep. Chrome users are not the customers.

These proposals have generally been named after bird things:

https://github.com/michaelkleber/pigin https://github.com/WICG/turtledove https://github.com/WICG/sparrow https://github.com/WICG/turtledove/blob/master/TERN.md https://github.com/prebid/identity-gatekeeper/blob/master/pr...

I believe "FLoC" comes from the phrase "birds of a feather flock together", which is a decent metaphor for how the proposal works

(Disclosure: I work for Google, speaking only for myself)