How would people react to a person suddenly changing their profile picture every hour when they haven't changed the picture in a year?   I personally hope to see shock and related reactions, perhaps comments and questions about the sudden change.  I'm hoping someone asks the question so I can explain why I am suddenly on Facebook when I only visit the site for messaging purposes every odd month or so.  I actually intend to take requests from friends on what picture I post for the profile picture, and see what people recommend and the reactions of those who know me, (and those who do lots of Facebook stalking).  Hopefully doing this will provoke some form of reaction.