And I mentioned in the essay that "In many cases, advertisers managed “remarketing” lists of “anonymous” visitors that was being tracked by cookies from a centr

And I mentioned in the essay that "In many cases, advertisers managed “remarketing” lists of “anonymous” visitors that was being tracked by cookies from a central console without thinking of the privacy problems, treating visitors almost as numbers." I wonder if such a use would comply with the GDPR BTW.