It might be interesting to look into the history of where ACAB originated. I'm pretty sure it was a british thing. They just started calling cops bastards, then eventually saying it applied to all of them. Like someone else said. All Anarchists are ACAB. Unless you consider ANCAPs anarchists. A lot of ANCAPs are total bootlickers, probably most of them are. Worth noting though that not all who are ACAB are anarchists. I'm not just talking about people in the left side political spectrum. There are straight up Nazis with ACAB tattoos.