Yes, but when there’s literally thousands of posts and comments to build the “between the lines” data within a 30-day time frame what excuse is there?
When somebody is trolling so hard that it’s causing strife within your community it should be addressed. Identify the behavior that isn’t desired and enforce existing rules around it or create a new one and warn the person that they need to operate in good faith within the rules or they will be ousted as an antagonistic troll.
But they don’t. They just formm small communities and slowly work their way back up to power.
Might take 50+ years, but it’ll happen again and again until crushed out.