I'm not from US and don't fully understand everything that goes on over there, but does this part mean that you can't sue any telecommunications company, just because they have cooperated with the government? How is that sane? Sure, I get it that the company was just following order, but shouldn't you be able to sue the one who made the order in that case? Thinking about it, you should be able to sue people who were blindly following orders, if the following the order means breaking the law.