How the fake 'Mad Men' Twitter accounts will go on after the show ends

After seven seasons that captured the zeitgeist of the '60s, "Mad Men" is finished. Or is it? From the beginning, the show attracted a lively group of Twitter role-players -- people who snapped up Don Draper, Peggy Olson and other show-related nom de tweets and presented a lively commentary and auxiliary reality to the AMC program.