Kaito is right, guys. As long as the GM doesn't implement extremely harsh punitive measures – up to and including automatically losing a city upon its first breach – the rules will continue to be violated. And they weren't created to be violated.
If, however, you punish the entire city with a modkill, it will at least weed out some of the "benefactors" who think: "Let them modkill me, but I'll help the team!" You know who I'm talking about.
I'm speaking freely because I'm not following the game and not participating in it.