[firebones]

This is a missed opportunity. As Shirky points out, social media is "publish, then filter", and you've found a powerful filter that lets you reap the benefits. (And he also points out power laws--10% of the people in your feed post 90% of the garbage.)

While I don't log in to Facebook more than once every six months, your observation gives me hope that I might be able to find some utility in it.