We're working out several ways to further separate disgusting trolls and spam from quality commenters who may be filtered by the greys. It's an ongoing process, however it is something we've identified as an issue and hope to streamline - to make it easier for editorial staff to jump into the greys to identify and… » 8/25/14 5:25pm Monday 5:25pm

Hey there! We don't currently offer that feature. What you could do instead, is go to an old post that your friend has commented on and reply to his comment. This will be publicly visible, but if the post is old enough it likely doesn't receive very many views. Your friend, however, will receive a notification of your… » 8/25/14 1:56pm Monday 1:56pm