Story was realistic until the cops actually did something.

Fake - Cops didn't wait outside the school for an hour because "it's too dangerous", while anon gunned down innocent emos

You either die a hero or live long enough to become the villian something something.

This reminds me of the movie "He was a quiet man"

While I was trying to find the name I also remembered the movie "falling down" that's alright too

Yes this definitely happened