I think noone should be forced but it should be Facebook responsability to contact authorities in case the notice something strage going on.
yea, i think wyden makes sense: "It would create a perverse incentive for companies to avoid looking for terrorist content on their own networks, because if they saw something and failed to report it they would be breaking the law, but if they stuck their heads in the sand and avoided looking for terrorist content they would be absolved of responsibility."