[senco-forum] photo/video as behaviour tool

I often use pictures of children behaving well to motivate and model good behaviour. but has anyone ever taken photos or video footage of children behaving badly and used them to discuss behaviour with child and/ or parents? 
  I'm not at all sure what I think about the idea - but have a child at the moment that i suspect it might work with - not quite sure why I feel so uncomfortable with the idea! apart from the obvious negative emphasis. maybe good and bad pics then discuss the reasons for variation in behaviour?
  Thoughts please!
  Kate