The movie and record industries have long contended that, in order to get a handle on the digital piracy problem, they must be able to hold the companies who facilitate such piracy accountable for the actions of their users. Up to now, the courts have disagreed, but the industry has growing support from legal experts and copyright enforcement groups. The issue is a big one, since it would be relatively easy to sue the largest purveyors of file-trading software, and nigh onto impossible to go after individual users of the software.