Guys (and gals, of course), take it easy!!!
Nearly every online media site that I know does have some "+" and "-" buttons where you can express that you either like or dislike (agree/disagree) the opinion posted. That, IMO, is a very natural process, and I always considered Facebook to be a bunch of cowards for only allowing the "like".
But then, I vividly remember the discussion we had here on this forum about voting on trends, where there was a sizable portion of people who were (possibly rightfully) afraid that having a "dumb/bad" button would lead to the forum falling apart due to bullying. Well, what can I say, I am also a member of other forums that have such a "dumb" button, that is also used - very sparingly, I have to say, and as far as I have seen, not with the intention - or effect - to "bully" people.
I, for one, do appreciate the possibility to express disagreement with others opinion.
Best regards,
Andy