Why stop at that? Why not have every book contain a QR code (crypographically secure GUID) and you have to be an "authenticated buyer" in order to participate. The ones that go to libraries could either be tagged specially or have the reviews scrutinized / shadowbanned until vouched for.

This started out as /s but now I just feel like all of my information and every daily habit is going to end up (sold) online anyway.

We're still hoping the owner of the New Goodreads doens't sell the ability to remove bad reviews. But what's the incentive not to? Hoping I see something better in the comments here.