What I am saying is that there are situations, that no matter what you do, you have no control. There are always going to be people you trust that screw you over and you shouldn't be held responsible. The people doing the crime and the actual damage should bear the burden of the crime not the victims.
Say I buy comic books for my retirement portfolio, or art, or some other tangible object and do my due diligence, research it to make sure it's the real thing, see the certificate of authenticity, research to make sure it's not stolen, etc, etc. I can still get screwed by a good forger that fools all the experts.
The same can happen with a company. I can do all my research and due diligence and make sure that the officers of the company are stand up people, I shouldn't be held responsible if they fool everyone and not just me.
You are punishing the victim of the crime when you punish everyone who owns stock of the company in this case.