User blog comment:DaNASCAT/Technical Update: March 21, 2016/@comment-24258073-20160324090858

Personally I think Roll-backers should be able to revoke their rollback status, if it is in their best interests to keep their status when stepping down from activity.

Also non-Bureaucrats are unable to remove rollback rights from their own account. This is essentially noticed with Administrators and Content Moderators, should they wish to remove redundant flags from their account, since they already have rollback rights by default.