Via the wonderful Joseph Lorenzo Hall, new food for thought from students at Berkeley SIMS: Content Availability, Pollution and Poisoning in File Sharing Peer-to-Peer Networks [PDF].

Update: Ed Felten: "The measurement study shows that, at present, corruption isn't much of a barrier to users getting the files they want."

Update #2: Prof. Felten's correction: "I changed the second paragraph to eliminate an error that was caused by my misreading of the paper. Originally I said, incorrectly, that the study found little if any evidence of pollution for the files they studied. In fact, they chose those files because they were not subject to pollution."