Details of how this frightening photo came to pass are available here. (If you share this reader's objection, however, then don't click through the link. Nobody is forcing you to press that mouse button!)
Update: The Wonkette post cited above now has this correction appended to it: "The original WaPo item, in stating that Channing signed an 'old photo' of herself for Roberts, could be read as suggesting that Chief Justice Roberts had this picture on his person. But a well-placed source advises: 'The Chief Justice does not carry around a picture of Carol Channing. She brought the picture, signed it, and gave it to him.'"