http://www.virusvsvirus.com
1.Virus is scary, the most hated thing,
2. Your site scare what is your indention while I share the virus file
3. By chance, the other user downloads the known virus from your site, you will be liable for lawsuits.
How about having/naming like a viruspedia which users could edit the nature of the virus, side effects, causes and loses and impacts.