Comment Username

This module came out of a request to be able to hide the identity of comment authors on comment by comment basis when comments contain possibly sensitive content on a site that does not allow anonymous comments.
This module adds a checkbox to the comment form allowing the user to hide his/her username when the comment is viewed. Instead of a username a generic username replacement is displayed instead (similar to CL-s fake email addresses). This module does not however prevent anyone from viewing a user's profile which should be managed at permissions level.

Note that if your site has mixed anonymous and authenticated comments then Comment Anonymizer might be a better fit.