Correct me if I'm wrong here, but I thought it was a right of people to participate in class action lawsuits. If Sony enforces an approval system for doing that in their TOS, it means they limit people's rights and thus the TOS cannot be fully binding due to this fact.
The part about writing a letter of disapproval is dodgy as well. They should give you a clear message that you can decline the TOS. Instead, you can skip over it without ever knowing it. In fact, I cannot believe that clicking a button binds you to a TOS, while a hand-written, signed disapproval needs to be sent to the legal department if you have any objections within a certain timeframe.
/rant
The part about writing a letter of disapproval is dodgy as well. They should give you a clear message that you can decline the TOS. Instead, you can skip over it without ever knowing it. In fact, I cannot believe that clicking a button binds you to a TOS, while a hand-written, signed disapproval needs to be sent to the legal department if you have any objections within a certain timeframe.
/rant