@Master Is this due to a plugin that messed up reputation settings? (@pichalite, I believe, summarised this issue for me)... if so, then it looks like a custom script has to be written to re-calculate user reputation points based off of post voting history.
Unfortunately, it is not something we can do for free (about $300 USD with proper testing, etc), so please contact us if you are interested.
Perhaps @exodo can alter his script to accommodate your request?
Auto-ban for low reputation was an option in the ACP, am I wrong? Now I can't find it (v0.7.2). Also there is no banUserForLowReputation() in the code. The settings had meta.config['autoban:downvote'] and meta.config['autoban:downvote:threshold'] properties, now I can't find them.
Any good reason to remove this functionality? Just curious.