Partly Facebook is a problem because of their top-down profit-driven manipulation. But partly it seems inherent to any recommendation algorithm that gives weigh

Partly Facebook is a problem because of their top-down profit-driven manipulation. But partly it seems inherent to any recommendation algorithm that gives weight to content you're more likely to share, reply to, etc. The stuff that outrages you is more likely to propagate. So what would be a recommendation algorithm that does not have this effect? What would it measure and optimize?