However in recent years all the immigrant gangsters have been playing shoot-em-up and ruining things for everyone (go figure), and so the community came together and decided - by unanimous vote - to collaborate with the authorities to eliminate the trade altogether.

Who would've taught that having no authority to curb crime and violence would lead to criminally minded people abusing that lack of control? And they had to hold a democratic vote (what would happen if it wasn't unanimous?) to bring in such an authority into their anarchy. That's exactly my point.