In Airtable, all collaborators are always allowed to see the names and email addresses of all other collaborators. (If you’d like the Airtable team to change this behavior, you may want to add that as a feature request in the #show-and-tell:product-suggestions category.)
As a workaround for this behavior, you could simply create your own generic names & generic email addresses for people, and have them log in with those generic email addresses. That would shield people’s identities.
In general, there’s not much security built into Airtable at all. For example, all collaborators (even commenters or read-only collaborators) can duplicate your entire base Into their own personal workspace and then share that base with their own friends; all collaborators (even commenters or read-only collaborators) can export the entire contents of your entire base as a CSV file; all collaborators (even commenters or read-only collaborators) can see all the tables and fields in your entire base; all collaborators (even commenters or read-only collaborators) can see all your blocks & all of your private API keys that are typed into your blocks; etc.
The only way to gain real security features in Airtable is to use Stacker, but unfortunately, Airtable doesn’t allow Stacker to have access to the “comments section” of each record, so if you’re heavily dependent on that comments section, then Stacker won’t work for you.
