April 2011 seems so long ago, but after Sony and its networks were hacked, bringing down the PSN for a good few weeks and putting a huge amount of personal data potentially out there, a group of US citizens filed a class action lawsuit.
The suit cited negligence, unjust enrichment, bailment, and violations of California consumer-protection statutes. All of these were dismissed, as Judge Anthony Battaglia found that Sony did not violate consumer-protection laws.
Crucially, it seems most of the rulings were based on the notion that the paintiffs didn’t actually subscribe to premium PSN services, and “thus received the PSN services free of cost”.
Finally, prejudice was ruled out because the breach had nothing to do with Sony, and was the result of criminal action.