A hard lesson for those who think that an “anonymous” e-mail address allows them to make death threats with impunity. One character who allegedly did this got a knock on the door from the men in black.
The FBI did some checking with Google, which led them to Yahoo, which led them to a specific machine and the person who was apparently using it to make death threats. I am all for privacy and anonymity, but that does NOT free us from responsibility for our actions. The Feds did this by the book, with court-sanctioned warrants and specific requests for specific information.
There’s a big difference between a by-the-book investigation and a warrantless information-gathering “fishing expedition” that is only legal “because we said so”. There are situations where a anonymity on the Internet is a good thing; this isn’t one of them.
Moral: If you wouldn’t say it face-to-face, don’t say it on the Internet.