The classic one is, of course, "ACAB," but I've already gotten into these arguments so I will spare you reading too much on it. Let it suffice to say all US cops are bastards (or, you know, they serve an especially malignant bastard function), all German cops, all UK cops, etc. But, to find a diplomatic way of getting this across, the security patrols deployed by the Panthers were also cops if that word has a non-moral meaning.
I think, and this is why I even bring ACAB up, that it gives people something to rally around and maybe even encouraged them to see things differently, and they get attached to it as essentially a dogma without seeing the analysis that produced it (or justified it, in any case). The slogan becomes the analysis. It becomes what exists in place of having reasons for what you believe, even when good reasons are out there!
I don't know how to do dividing lines
I think it's pretty funny when some asshole chud gets fired or injured or whatever and someone comments "another kkrakkka down, unlimited genocide on the first world". The humor comes from the absurdity, that there is no such genocide in the works and the subject in this case usually isn't even dead. It seems like a perfectly fine meme.
So then a huge hurricane hits Florida, we have hundreds of normal, mostly poor people dying and people are saying this and, when someone goes "Hey, that's not right" they double down. [I was busy when this was happening, this isn't me complaining about being dog piled or whatever]
The weird thing about it is that I thought it was 100% a joke, but some people got attached to the phrase in a way that reminds me of people going "ACAB means ACAB" as though it's anything other than an unhinged exclamation that is funny because it's unhinged. I don't know how this happened, but I am forced to conclude that the way the meme was treated up to this point was conditioning people in a detrimental way. Or maybe they were always bloodthirsty chauvinists, but that seems like the greater leap to me.
Of course there were a couple of pathetic, cowardly losers in the mix saying "Oh, don't take it so seriously, it's a shitposting site". Those people I direct to 4chan. Antisocial behavior is antisocial behavior, and calling it meaningless to escape that it does have a meaning and that meaning is quite negative is contemptible behavior that should be rejected by the policy of any space that claims to be leftist.
Anyway, I don't really have a call to action or anything, except perhaps: Oppose Slogan Worship.
I have about a dozen cops in my family. Through them I've known hundreds more cops who are their friends. They think I'm ideologically similar to them (clean-cut white man with a business education and respectable career and no criminal record) so I hear all sorts of insanely racist and queerphobic shit that they think is safe to say around me. I have a good poker face though. For me the ACAB slogan issue is not one of either being a general slogan I blindly follow, or coming from a personal grudge due to being caught breaking a law. For me, "ACAB" is an evidence-based conclusion with a lot of data points. I do not trust any of them to abide by their various codes of conduct when no-one's watching. Hell, I don't trust any of them to carry a weapon more dangerous than a water pistol. And even then they'd probably add capsacin to the water and aim for the eyes.
Notice that my problem wasn't "Nobody thinks about the good cops in the admittedly mostly bastard cop population", my problem was "Some people aren't distinguishing between different bodies of cops, who will vary based on who that body serves". I'm sure that you are right about whatever body of cops you're talking about there and I don't support you (or anyone) saying ACAB in reference to cops who serve socially reactionary bodies like the establishment powers of the anglosphere.