Sometimes we might observe a vulnerability or security issue in the website and adding a feedback in public form is not recommended because other might abuse it. Therefore, I would like to advise to add ability to share a private Feedback regarding to security issues in this website and ability for moderator to make a feedback as public or private.
One other possibility is to add qna-security-feedback and adding this tag will automatically make a post as private one. This is really important request because there is a possibility to find a security issue in this platform too. In addition, the relationship between such feedback with Microsoft Security Team should be defined.