Well, an idea passed my mind just now. Warez forums are not illegal. The dont store the files on their servers (some they do but they are just exceptions) so dont break any law for distributing illegal files. Or maybe there is a law which says that giving out information about where to find illegal data is prohibited?
In your license agreement with your host you'll often read that it's not allowed to hava any warez related things on your host. Also includes links to warez.
If you're just talking about Warez then it's ok. But whats a Warez community without links to warez stuff... that's like a chocolate bar without the chocolate.
Forum will support and promote warez software idea, which will support the illegal. I think it’s bad.