Earlier quoted context omitted.
> #ACAB At least for me, this comment loses its thrust with this hashtag. It takes a potent observation and adds unnecessary partisanship. It's also connected with the mother of all blowback slogans: defund the police.
My experience with the police has been universally terrible. They think they are above the law and trusting them to do the right thing or “tell the truth and you’ll be fine” is extremely bad advice. Get a lawyer and be very careful around these people is my more nuanced take on them. Edit: I commented before you made your answer more nuanced so I’ve changed mine too.
It's a bad guess.
EDIT: Police in America have a "thin blue line" problem of reflexively defending peers' mistakes. Their cultures look disturbingly similar to gangs, though I don't think that's intentional--they're better described as fraternities with guns. (Which also describes gangs. Convergence.)
That said, new recruits aren't corrupt. And most cops are trying to do the right thing. More fundamentally: most Americans want a police force, and when the police stop working, the most proximate token is torched.
So yes, I get the drive behind the slogan. But it's counterproductive to a ridiculous degree. And it's nowhere proximate to a solution. On HN, I figure we can do better.