Negative city-states are an experimental idea that I'm trying to develop to spice up the game a bit.
In history, it has happened many times that flourishing empires suddenly experience "accidents", which change the course of history that seemed all mapped out.

"Negative" city-states are traps for the AI. Be careful not to complete their quests inadvertently, otherwise you too risk having this trap.
You can also challenge yourself to get there anyway. With them you still have yield gains (culture, faith, etc.).

Okay, so this is a series of "Negative City-States"

What was your thinking behind these? I mean, interesting idea, but who would actively go after these negatively impacting CSs? It's this for when I want to pretend I'm an insane drunk emperor or one of those 'I hate myself and want to die' scenarios?