Ever heard the term 'collateral damage' ? If PayPal gets trashed (or at least significantly service impaired) that is going to hurt people way beyond PayPal. People who are trying (as I am) to keep up with the Christmas/Holiday rush, and wondering why so many orders, paid via PayPal, are not completing.
An attack on PayPal is an attack on the wider business side of the web. Basically PayPal is the guy caught in the middle of a dispute (between Wikileaks/hacker community and the US Gov/Dept of State).