The difference is that as a scientific reviewer you are not hiding a physical location and what you need is plausible deniability, which would still exist. In addition to this, actively attempting to deanonymise your reviewers is on the level of scientific misconduct that your employer and professional organisation should consider taking disciplinary action against you. I am not arguing that this makes it entirely safe to publish anonymised reviews and that we will not affect reviewer behaviour (maybe for the better in some cases, as "one-sentence reviews" will be something in the public record), but it is in stark contrast to the example that you bring up.