We know since quite a long time that often virus/trojan-infected files are distributed via Peer-Neworks as Kazaa and that this poses severe security risks.

Now, a court in Austria decided that its users are breaching copyright laws as well: http://today.reuters.com/news/newsArticle.aspx?type=internetNews&storyID=2005-09-05T152751Z_01_FOR523610_RTRIDST_0_NET-MUSIC-KAZAA-DC.XML

Roger