I’ve been banned without explanation for “vote manipulation,” but never did anything of the sort.
Feining ignorance isn't going to help you. Mods can see your votes, you decided that without any activity you were going to downvote hundreds of posts across a handful of communities, the mods noticed you doing this and banned your ass to put a stop to it. Here's a tip, mods can ban you without submissions because of a little thing known as Tesseract, want to stop getting banned? Start blocking communities you dislike instead of trying to brigade them.
Yeah, dbzer0 is an AI friendly instance, it's not just allowed, it's encouraged.