Passing the buck
"Legislators have grown so worried about inadvertent leaking of documents over P2P networks they've considered draconian bills that could render entire web browsers and operating systems illegal".
Such people would probably like to close down newspapers, radio and TV as well in case any of those got their grubby mitts on information they'd hoped to keep secret. But, hey, "Land of the Free" :-)
If one wants to keep data secret you've got to keep it secret. Draconian measures on those who want to break that secrecy are perhaps fair enough ( though there's always the 'public interest' and 'for the greater good' defences ), but otherwise it sails close to the wind as collective punishment for their failures.
As to "inadvertent leaking", that's just spin for top-down failures in keeping secrecy. The people ultimately responsible ducking their responsibility, passing the blame. That's well evidenced in the McKinnon case.