Ability to turn off Comments in the Admin Portal

Hi all, concerned that when I go to mention someone in a comment, the suggested users are sometimes not in the current workspace. If I have a secure workspace, I don't want anyone able to send a comment to anyone outside of that workspace/app. There should be a way to turn comments off across the organization. I think it is a security problem. As an admin, turning them off on a report/dashboard individually is not a good long term solution because I can't control the comment settings that my tenants use on their own reports/dashboards.

I see that Report Subscriptions can be turned off so I feel like it would be similar functionality to hide the comments button from the toolbar in all reports/dashboards if changed in the Admin portal.