An absolutely fascinating research paper on how a group of college students setup fake P2P clients that did not distribute any illegal content, and were able to "frame" innocent network devices on the University of Washington campus, such as a group of network printers and a wireless access point.
It is a very surprising look into how easy it is to spoof Bittorrent packets and potentially get someone else in trouble for a crime they never committed.
You can read all about it
here.