> get eventually busted because someone would open their mouth
Aren't this what "corporations are people" prevent? Plenty of people doing shady, or outright evil stuff, get their way because they're behind a corporation.
It's more like conspiracies fall apart whenever there is more than 1 person. When there are 800, then it's over immediately.
Evil or shady acts must first be illegal to be potentially prosecutable crimes or be injurious to have standing as tort claims. And limited liability isn't unbounded.