Just sounds like a form of DRM to me.
I could see it working on something like Facebook, but it'd have to be opt in. As app suggests there are a number of reasons people wouldn't want their own pictures to just start disappearing from the web. I'm sure many people rely on Facebook as their sole backup, or even the only copy, of their most cherished albums.
Also, how many people realize a picture is embarrassing/inappropriate at the time?. It's only later you look back in shame, especially for teenagers.