I often receive a paid for service that I really appreciate, then I get asked to express my opinion in a review (trustpilot e.g.) and I just go silent.

I feel bad but the truth is that it's the world-at-large's failure to adopt well understood cryptography that's at fault here.

Why in god's name, in 2023, do we not have a way to post reviews with anonymity but ensuring that we are "genuine in context" (here it would be, proof that you are a customer of a certain type). All kinds of simple blinding and zkp tech makes this entirely feasible, and it has been for ..15-20 yrs?

I see absolutely no reason to plaster all my purchasing events, tied to my name, all over the internet, but yet I *do* want to give help to companies that do me a great service.

Another similar one is, ~ 3 decades after it became possible, most institutions (govt departments, banks) are not using digital signatures at all for official docs, despite how massively it would improve processes.