Sony, along with several other big companies, has recently tried to institute a "no sue" clause in the terms of service agreements for its consoles.
To oppose this, some people are, yes, trying to sue them over their "no sue" agreements.
According to a report on GameSpot, a man in Northern California is leading a suit, filed in November, which alleges "Sony engaged in unfair business practices by forcing consumers to either give up their right to file a class-action lawsuit or give up access to the online gaming network they effectively paid for when they purchased the hardware."
While this sounds a little crazy, remember, the legality of these "no sue" agreements is highly questionable, given they seemingly strip away many Americans legal rights, so he may just have a case.
Sony sued over terms of service update [GameSpot]