I see this sentiment a lot whenever class action lawsuits are discussed, but as a lawyer that has absolutely nothing to do with class action lawsuits, I would like to point out that one of the biggest purposes of class action lawsuits that people normally overlook when complaining about them is the deterrence effect.
Class action lawsuits are basically one of the most, if not the most, expensive form of litigation a company can endure. Even though due to the number of plaintiffs, in the end each person might only get a $10 gift card, the combined cost to the company of that are staggering.
In this case, it would be taking Sony to task, and hopefully Sony would see the error of its ways and back down. Even if that is not the eventual outcome, it sends a message to all the other bad guys out there, if you engage in this type of shenanigans, you should think twice because it will cost you dearly.
In a way, the lawyers who bring the suit are acting as private attorney generals, punishing wrong doing that may not rise to the criminal level, but affecting large swaths of the populace in a tortious fashion nonetheless. While no doubt the lawyers involve need to be incentivized to engage in this activity somehow, whether they should be rewarded as richly as they are for it currently is another issue entirely...