Knowing how to break into systems will not protect you from viruses, nor will seven pages of C source code for a variant of the Crack program. Phone phreaking isn't that easy, trying the stuff in the book can get you arrested, and it has nothing to do with viruses. Chernobyl is a variant of CIH, and not the other way around. Backing up the Registry provides no inherent virus protection. Anonymizers for email and Web browsing have nothing to do with viruses.
Cookies have nothing to do with viruses.
Happy99 used Usenet news, as well as email. Chat has nothing to do with viruses. Email encryption has nothing to do with viruses. The Melissa virus was not polymorphic. Polymorphic viruses do not change their payloads.