[Cyrus]

It is a fact that the books you or any other American is borrowing from a public library (perhaps even a private library) are being monitored, along with a number of other activities.

Since this is a fact, it follows that the people who are doing the monitoring will investigate when something comes up on their radar -- and they get to define what's on the radar and what's not.

Part of the investigation might be asking the "suspect" some questions. As those guys supposedly did.

But even if that particularly story turns out to be totally untrue, the circumstances are there for the scenario to be played a thousand times. The most you can accuse those spooks of doing wrong is being very blatant about it!