I'm torn. I'm ML but I'm all about that leftist unity and I love my anarchist comrades. So in that sense, I do really prefer the red/black flag.
But then again, damn that all-red flag just looks so damn good. It's simplicity really gets the point across. And the all-red flag does have some links to the anarchist movement in the 19th century, IIRC. Not to mention fucking ancaps have co-opted the black for their lame ass yellow/black flag. It sucks but I despise them so much.
I dunno, what do you all think?
This is all black erasure.
Also, the ones with AKs on them are good.
Also also, red and black gives you more options to color coordinate.