Sorry, had the wrong link in the clipboard (edited), here it is:
Ah, that makes more sense. Yeah, it is a known problem that the FBI will send data requests accompanied with a gag order. So they collect data on you and prevent you from being notified about it. I found out about only when I saw this. It sounds like with some of the data they are requesting, services would have to notify all their users. I imagine that would be a bit of a PR nightmare for the FBI.
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