For those who haven't been watching Cartoon Network's Adult Swim on Saturdays lately, Death Note is an an anime series which centers around high school student Light Yagami, who finds a discarded notebook labeled "Death Note," lying on the ground (as with most anime, Death Note was previously a manga series).
The Death Note's instructions claim that if a human's name is written within it, that person shall die. The writer must know both the face and name of the "victim," to prevent mistakes. Yagami tries it on a couple of criminals first, and discovers it works.
As he continues to rid the world of criminals, he attracts the attention of the police. To protect himself, he begins killing innocents as well as the guilty.
In Richmond, Virginia at the Franklin Military Academy, a student was caught writing names in a Death Note notebook (reproductions are readily available). Naturally, this caught the attention of school authorities, who suspended him and sent a letter home to parents about it.
The letter also indicated that parents should go to the official website, to get more information on the series, and to be able to understand the context of the Death Note.
Update: an alert reader noticed that the website indicated in the school's note is not the official site at all, but a fan site. I hadn't noticed that in the video. Make sense, as Viz wouldn't place a simulation to put entries in a Death Note on their site.
Watch a video report: