The problem with industrial piracy of DVDs is that getting hold of a press is an expensive business. As I understand it, the main area where the film companies is with people copying DVDs onto DVD-Rs.
There's been a recent change in the law regarding this. It is still legal to create backup copes of any kind of data media with the exception of a DVD. The making of a backup means that the wrighful owner of the media may make one, and only one backup of the original media and the backup copy may only be used in accordance with the licence of the media that was copied and by the licence holder of the software. DVD piracy is obviously such a problem that a little while ago, in the USA (and possible the UK, please correct me if I'm wrong), the 'backing up' of DVD media, even in accordance with the above guide lines, was made illegal.