I pay to be able to play online.
I'm getting really tired of this shit, Sony.
I imagine that they feel the same way.
Write your relevant elected rep about your passion for the security of the online marketplace and the need for stricter laws and more enforcement of any existing DDoS laws.
That's more likely to affect the situation than complaining here and has the added bonus of focusing on what is blameworthy - inadequate focus on protecting the online marketplace.