Summary:
I downvoted pro-AI comments in a post in leftymemes community. It was LLM generated polandball comic (Which is objectively pathetic as fuck) that showed up on my feed, blocked couple of users who I thought were unhinged, and have blocked the whole instance on my client after realizing how rabid these morons are.
I didn't go looking for AI posts like a vigilante.
One user in question got miffed for being downvoted and banned me from places they moderate.
Lefty memes isn't pro AI (though they're not exactly anti-AI either); I saw the bans and thought they were downvoting stuff on the communities in the mod log. Also OP was in flippanarchy (which also isn't explicitly pro, though also not anti, AI), not lefty memes. It seems the mod banned OP from their comms on their pejorative, at least with the information we have. I edited the parent comment to that effect.