The problem isn’t the Chinese it’s server size. On private servers, everyone is shoved into a small single server creating a gross amount of overpopulation. With many different servers and regions, the player base will be split into smaller groups with fewer chances of mafias being created.
Will people still do things like the devilsaur mafia?
Of course.
Will you see it on your specific server?
You’ll see in a couple of months.