The administrators at a Virginia elementary school were warned three times that a six-year-old boy had a gun and was threatening to shoot other students. Three times, by three different people! And still they refused to do anything! The result of this indifference on the part of the administrators was that a teacher ended up getting shot.
Many examples could be cited. Most tragic is how the FBI repeatedly ignored red flags reported to it leading up to 9/11. Two men of middle eastern descent are paying $10K in cash to learn how to fly a plane. And the plane they want to learn to fly is a Boeing 747. And they don't care about learning how to land the plane! C'mon FBI, how many red flags do you need before following up?
And now we have the five members of the SCORPION police unit in Memphis who recently murdered a 29-year-old Black man. It turns out that there were numerous complaints made about how this renegade police unit was harassing Memphis citizens. These folks saw something and were saying something, but the powers that be ignored them.
Most often someone who "says something" is chastised for interfering in other people's affairs. We have a "mind your own business" culture, unlike other countries which have a sense of community that is sadly lacking here.