In October, U.S. District Judge Marilyn Hall Patel temporarily barred sales of RealDVD after the product was on the market for a few days. At the time, the judge said it appeared the software did violate federal law against digital piracy, but ordered detailed court filings and the trial to better understand how RealDVD works.
Notice what is happening: the DMCA allows a single judge to take a product preemptively off the market based on an "appearance" of guilt.
Much of the harm in IP law would no doubt be alleviated if we just got rid of the use of injunctions.