I wouldn't want it to be too complicated, but I wish we had just two other reactions to choose from. I hate to indicate that I like a post like this, but there's no other way to acknowledge it. Maybe the heart could be orange for "I share your anger" and blue for "I share your sorrow"?

Understood! I take it to mean any of “like the facts or situation described”, “agreement”, “love the way you worded it”, “thanks for sharing / today I learned”, and probably a bunch of other possible things.

Yep – since it's the only response we have it can mean almost any positive reaction (positive in the sense of "I'm with you" even if it's a bad thing). I didn't think you didn't understand my like, it's just that *I* was frustrated by the inability to express my own rage along with you.

Yeah, I share that frustration!