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The paper finds that there is a serious flaw in how these [media industry] trade groups finger alleged file-sharers. It also suggests that some people might be getting improperly accused of sharing copyrighted content, and could even be purposely framed by other users.

In two separate studies in August of 2007 and May of this year, the researchers set out to examine who was participating in BitTorrent file-sharing networks and what they were sharing. The researchers introduced software agents into these networks to monitor their traffic. Even though those software agents did not download any files, the researchers say they received over 400 take-down requests accusing them of participating in the downloads.

The researchers concluded that enforcement agencies are looking only at I.P. addresses of participants on these peer-to-peer networks, and not what files are actually downloaded or uploaded—a more resource-intensive process that would nevertheless yield more conclusive information.

In their report, the researchers also demonstrate a way to manipulate I.P. addresses so that another user appears responsible for the file-sharing.

An inanimate object could also get the blame. The researchers rigged the software agents to implicate three laserjet printers, which were then accused in takedown letters by the M.P.A.A. of downloading copies of “Iron Man” and the latest Indiana Jones film.

Read on. [via Boing Boing]