On top of that, Facebook tries to surface interesting aspects of the passively shared information. If multiple friends read the same article, Facebook will tell

On top of that, Facebook tries to surface interesting aspects of the passively shared information. If multiple friends read the same article, Facebook will tell me. If someone visits my profile, they can see what music I've been listening to for the past month. There is a such thing as having too much shared information to deal with, but Facebook filters it and presents it in a way that I find useful.