A man in Atlanta gets "interviewed" by the FBI because someone reported he was reading something that looked suspicious:
Trippi's partner speaks up: "Any reading material? Papers?" I don't think so. Then Trippi decides to level with me: "I'll tell you what, Marc. Someone in the shop that day saw you reading something, and thought it looked suspicious enough to call us about. So that's why we're here, just checking it out. Like I said, there's no problem. We'd just like to get to the bottom of this. Now if we can't, then you may have a problem. And you don't want that."

You don't want that? Have I just been threatened by the FBI? Confusion and a light dusting of panic conspire to keep me speechless. Was I reading something that morning? Something that would constitute a problem?
Read the whole thing for his experience, or if you want to know what diabolical document he was reading at the time (or if you want to know what inspired the title of this post).
My co-worker, Craig, says that we should probably be thankful the FBI takes these things seriously; I say it seems like a dark day when an American citizen regards reading as a threat, and downright pitch-black when the federal government agrees.
You got that right.

Via EFF.