"Can you sue the financial industry for losses in the market." - Unfortunately, apparently not. While I appreciate this person's point, it misses the mark.
In this case I think it is more can you sue television stations for having ads for companies that caused the financial turmoil. such as AIG, Goldman Sachs, etc. Perhaps we could sue the FCC for allowing those ads. Generally, the answer to that question is no, and I do not think it is fair to sue Tor because somebody uses their product for bad purposes. If somebody purposely crashes a car into people, you cannot sue the automaker.
As to the main point, for too long, rich and powerful companies have suffered no consequences for their bad behavior, and often others suffer the ill effects. So it may not be possible to sue the gun makers when somebody uses a gun to kill somebody, yet often these companies support laws that make it easier to buy guns. We could, however, apply Milton Friedman's concept of "Neighborhood Effects" and make companies pay for their bad actions. In the case of gun makers, we could charge them every time somebody is killed with a firearm, say $20,000. Every time somebody is injured, we charge $10,000, and for crimes committed with firearms, we charge $5,000. This gives the companies an incentive to keep guns away from bad people.
For the companies that caused the financial crisis, we could limit the CEOs' pay to $100,000/year until we get back to employment at pre-2008 levels.
Obviously, there are many ways this principle could be applied, and we do need to find a way to make companies and individuals pay for their bad actions.