Eh, more often than not, it's pretty clear who at least one of the authors of the paper is by just looking at what they cite. Double blind review is not a foolproof system of avoiding creds and appeals to authority.
We find that anonymization is imperfect but fairly effective: 70%–86% of the reviews were submitted with no author guesses, and 74%–90% of reviews were submitted with no correct guesses.
[0] https://cacm.acm.org/magazines/2018/6/228027-effectiveness-o...