This document discusses how software insecurity can be distributed through social networking. It begins with background on software insecurity, which has historically spread through means like floppy disks and early internet sharing. The core topic examines how viruses can propagate through social networking sites as users communicate and share files through features like email, instant messaging, and photo sharing. It also explores how applications and tools used for social networking could host infected content or macros. The document concludes that social networking has become a major means of communication but also enables various ways for software insecurity to spread between users.