I think we should start an investigatory company that vets all these securities to make sure they're on the up & up, and prescribe a common set of guidelines for them to follow, so that they're not likely to disappear overnight with their investor's money and accusations of insider trading.
Srsly tho, this doesn't sound like such a bad idea. They could also insure the vetted companies' clients and shareholders against this kind of failure.
Of course there's still the problem of watching the watchers.