The comment probably predates changes we made to tighten up who can see other users' email addresses. By default, only administrators can view email addresses, which is appropriate for a public facing site. However, any site administrator can change this behavior by assigning the "See Email Addresses" role at the root:

- Admin -> Site Permissions
- Assign "See Email Addresses" to the user(s) or group(s) who are allowed to see email addresses
- Save and Finish

This page provides general information about security roles and specific details about site roles: https://www.labkey.org/wiki/home/Documentation/page.view?name=permissionLevels

Adam