[akincisor]

Only on one of them:

- Your "friends" are known and tracked

- The content you view is determined by your browsing history, ad tracking and that of your "friends"

- The composition of the audience that's voting is poorly informed and susceptible to non-critical thinking (YMMV)

On both of them:

- Stories are posted to maximize your outrage/other emotional response

- Content of stories rarely matches the titles

Social interaction and even a like button is not the problem. What the like button does is the problem.