[Lineup]

Right! And that's really a great point, it can be a positive for individuals. Except that for society it has negative value. This is like opening a mine, extracting all the resources, and leaving behind a poisonous scab on the earth. (Not coincidentally the way I picture MZ.)

[alphachloride]

I have not seen evidence to quantify its value to society as a positive/negative. Would society have been worse off or better off without Facebook? I believe that is not an answerable question because it is alternate history.