They can't. None of these schemes work without the complete consent and assistance of company management. They absolutely know what is going on and are full partners in making them work. Which is probably why there really are not many (if any) legitimate lawsuits against the financiers.
Any CEO or other member of management of any of these companies that says they didn't know what was happening with their stock is flat-out lying. And if they truly didn't know what was going on, they are dumber than a sack of rocks, and have no business running anything, much less a public company. But I highly doubt there are any of those out there.