Talked to someone at a large company who had admin access to survey results (require to do some analytics). The survey was “anonymous” but results were geo-located, and had some information about the team they came from, which in many cases was enough to clearly identify people. There is a difference between “doesn’t have a persons name on it” anonymous and actually anonymized in a way hardened against figuring out who is who. I don’t think anyone really does the latter.