There is a great (trustworthy/trusted & purely client-side) generator for antifa logos at https://antifa.s3lph.me/
For inspiration see also #AntifaLogo & #AntifaSticker

Thx @s3lph, h/t @Lambo

(I'm posting this because a reply of mine mentioning it is getting some attention)

[Would be nice to see and be able to change to actual values in addition to the sliders, though. I don't have the time for a PR, but maybe someone else^^]