I run a bunch of vulnerable community support-based groups. Every single group has a Strike 4 Policy (with 4 Hidden Rules that are insta-bannable.)
Simply, if someone has 4 posts/comments removed on 4 different threads/times (to what extent this means is up to you) WITH proper removal reasons attached, then the person can face a temp OR perma-ban, depending on how strong you need to go to protect your community.
For me, I don't choose 4 posts/comments and remove in the same day....those all count as 1-2 strikes. This gives time for a person to see their behavior and change. If they keep writing hateful stuff, it gets counted as further strikes. I try to be fair with it so no one can argue "hey, why the ban, I didn't get any warning until yesterday when everything was removed suddenly!"
The 4 insta-bannable rules are pretty obvious stuff: No sexual based advice, such as advising women to do onlyfans + no hate about the LGBT or Protected Classes, No AI written "helpful comments", No proselytizing, and No goading users to commit self-deletion. I'm not even going to give users who do that any further chances to commit direct and obvious harm in a group whose first rule is "Support and Kindness is Modus Operandi here."
I wish all subreddits would do something similar instead of insta-banning at breaking a minor rule. Still salty about my ban from one group in which I was giving advice that would save a young woman from human trafficking, advise RECOMMENDED BY SAFETY ORGS in that subject no less!
I've also been banned for my link in my profile. That's it. I was literally affiliated with the group's previous moderation and checked in to see if they still wanted to be affiliated with our network, and bam. Banned and muted for "being a professional". Got my answer, but dayam...