I've been day dreaming about as more social data goes public on the internet how can that enable us to peer into the lives of folks who post material and leak d

I've been day dreaming about as more social data goes public on the internet how can that enable us to peer into the lives of folks who post material and leak details of their lives online. Can sociological studies be made where these bad choices can be reviewed in accelerated form where the individuals who picked the wrong path show the fruits of their choices visually and the decline is evident just looking at them and hearing the things they talk about. Not sure how feasible it is, but I think with all the photo and video data we now have on hand what sort of longitudinal studies we can produce from imagery alone with the occasional detail and context self professed by the individuals involved.