Board Thread:Support Requests - Getting Technical/@comment-24567267-20131029221018/@comment-1330470-20131030042459

You mean a tag that appears on users' pages if they're rollbacks, similar to the ones that exist for "Blocked", "Chatmoderator", and "Admin"s?

That doesn't happen by default, but if you install UserTags you can customize the user tags to a ludicrous extent. =)