> Admin removes auto-bans for people who troll and get negative thumbs.
> Admin makes special names for negative ranks and encourages trolling.
> Bunches of people start "trolling" and generally being dicks because now there's no punishment for it.
> Bunches of people get their levels extremely negative.
> Admin reinstates auto-ban, ending up banning all of those people who joined in and started trolling.
> All of the trollish people are banned, leaving all of the normal people left on the site.