If there's one thing that makes me mad, besides seeing one person demean another, it is when my ideas are dismissed as sub-standard or unworthy of consideration. I'm a smart guy, exceptionally strong with problem solving and critical thinking. I appreciate somebody taking time to explain how the reaction system works, but for people to react with 'angry' as they did when I explained how that would be interpreted, that's just cruel. It doesn't help that the person who "loved" it has a name that stands for "Please Quit Showdown."
My next step will be to suggest to Facebook that it do the same. However little I use Facebook, anytime I react to something, I often find that the right reaction is not an option. Disgust is a way of saying "this does not please me" without saying "this displeases me." It's the "I've read this, but you can count me out" reaction.