Emotional stake is an interesting topic. The beleaguered rappler.com introduced a "mood meter", with 8 emotions to chose from, below each article when they launched (2013?).

On the homepage, the most voted upon articles would be displayed, in a very prominent and slightly interactive graphic, with the main chosen emotion, and also ripples to other articles the same people had voted on.

Generally, it seems that society is very angry and has little tolerance. But positive celebrity news makes them happy.

In 20/20 hindsight, it was a waste of developer resources - but great practice for the team at the time. Nothing the internet hadn't yet taught us was revealed.