Not so sure about the "a lot of people at the fleamarket not selling pirated items" part though. Nearly everybody I've met that uses a P2P client like Gnutella/iMesh/KaZaa/Hotline uses it mainly to download illegal content. There is even suspicious content on BitTorrent as well. There are quite a few sites out there that put encoded movies and tv series episodes onto it.

The problem is that everybody "knows" that you can get free movies/music/whatever off P2P networks now. Even completely computer illiterate people know that you just need to get Kazaa and download away. They don't seem to think that they're doing anything illegal. And if they do know they're doing something illegal then they think that they won't be caught since there are so many other people out there doing it.

- Trevor