In an action brought against Mavis Roy for sharing music online, RIAA member Universal Music Group was forced to settle because Ms. Roy did not even have a computer at the time of the alleged infractions.
The label dropped its case after evidence provided by anti-piracy snooping firm MediaSentry was successfully challenged by the defense's expert witness Dr. Sergey Bratus. Among other key problems with the data, the defense pointed out that Roy didn't own a computer at all at the time of the supposed infringement and that it wasn't until a letter appeared that she was aware of any possible action.
Somebody is probably losing their job for this!