Copyright law

There were statutory damage rules involved somewhere that meant you could be liable for fines even if there was no evidence of actual harm - I can't recall if that was associated with the direct infringement or with contributory infringement, but it was definitely used to target people who were just seeding torrents, and I'm pretty sure there were cases early on where people had to invoke the first sale defence to avoid liability for breaking some of the dumb-arse CD copy protection schemes that existed. But one of the things that came out of the early court hearings on this stuff was case law that imposed more reasonable restrictions on liabilities if there was no commercial motive behind the infringement, which put a stop to a lot of the ridiculous behaviour by the record companies.

The current state of the law is quite significantly different to what it was back in the early 2000s, not because of amendments to the written law, but due to the build up of case law and precedent.