Facebook users express concerns over possible 'dislike' button

Facebook users took to the social media site on Wednesday to react to the company's decision to test what Facebook Inc. Chief Executive Officer Mark Zuckerberg called a "dislike button" - and not everyone liked the idea.

In a town hall-style question and answer session Tuesday, Zuckerberg took questions from users about topics ranging from virtual reality to his wife's pregnancy. Yet most Facebook users fixated on his announcement that the 1.5-billion user social network was working on adding a button other than "like."