As great as it is that they're targeting these CISPA supporters, there really needs to be a way to prevent the collateral damage (regular users who now have their credit card information leaked). While this will certainly hurt the company, the potential consequences are much graver to the service's innocent users.
Actions like these may even, out of fear, bring people to ignorantly support CISPA thinking it will make their personal information safe from such attacks.
Actions like these may even, out of fear, bring people to ignorantly support CISPA thinking it will make their personal information safe from such attacks.