The app would need to have its own reputation to protect (i.e. a brand). I think the best approach for this is an app with a large community behind it. For a wh

The app would need to have its own reputation to protect (i.e. a brand). I think the best approach for this is an app with a large community behind it. For a while, that seemed to be Epinions. I'm not really sure why it didn't work out for them.