I guess to something like this could be leveraged to provide a much better "what should I read?" aspect because people have curated it in a way to indicate what

I guess to something like this could be leveraged to provide a much better "what should I read?" aspect because people have curated it in a way to indicate what is really valuable under different tags. Of course you would want public/private, people wanting to use it purely for their own benefit can choose to stay private and not have their interactions aggregated.