@cstross
I don't know if that's any consolation, but on account of reviewing being a job, I don't put stars on things online for free.

And I also don't care about said ratings by people who obviously are willing to work for free for large corps.

(though I accept that averages of thousands, even with the proviso above, likely carry some information)

@cstross I think you've stumbled upon an interesting concept here; the literary equivalent of a Trap Street or Mountweazel. A fictitious entry designed to detect various types of misuse of a data set, usually to prevent copyright theft, but in this case to detect fake or malicious reviewers. Perhaps Goodreads or others could think about intentionally creating this type of entry for this purpose.
@cstross @CStamp As a reader (who does not write either books or reviews), I find the reviews interesting in a sort of car-crash-fascination mode, seeing what the people who write the reviews completely missed that I, a slow and not especially perceptive reader, found obvious. There seems to be a set of people who pay only enough attention to the books they read to write a plausible "review" and move on without really interrogating anything.