'Dislike' button on Facebook?

Facebook founder Mark Zuckerberg recently said that a 'dislike' button is going to be added to the popular social network. It may be necessary to use the new button sometimes, but I wonder if it will be misused by users spreading hate and hostility. In my opinion, instead of 'dislike', an 'empathy' button should be added to Facebook by which users could express their reactions to posts about death or loss.  

Professor M Zahidul Haque
Department of Agricultural Extension & Information System
SAU, Dhaka