Remember?
"With so much chaos, someone will do something stupid. And when they do, things will turn nasty."
I'm not aiming at the justification of this shooting itself. Personally, from watching the situation, I can somehow relate to that cop opening fire. Being outnumbered and attacked, that gun could just as well have been turned against himself. (Btw, would a link to that be "appropriate" for the topic or fall under Rule 5?)
But well - put people into a situation where no side will back off, keep that situation going, and that's what you get. Not a single stupidity, but a row of stupid actions leading to a point where the logic decision is to shoot. Problem here in my opinion: While V did show the "good" outcome, I'm not so sure about Hong Kong at this point. After all, there's still the guy below....
And really all he needs to do is wait and see the events unfold.