This is true, tho installing linux is probably not going to make a difference if you are a target. But the USA can issue national security letters through the F

This is true, tho installing linux is probably not going to make a difference if you are a target. But the USA can issue national security letters through the FISA court with gag orders that keep the NSL secret. Not only that, but the major US companies have lucrative government contracts such that it can be in their interest to provide the US government with certain kinds of access without being compelled through national security letters.