The section on AV software makes it sound like the Author doesn't actually have any experience running AV software. Has the author decided he would rather be "The guy that says he won’t need antivirus software and then ends up needing it."
There has been more data loss because of having anti-virus software installed on OS X than there has from OS X Viruses. Until OS X AV software has a better track record I am more afraid of the AV software than I am of Viruses. I know how much AV software sludges up a windows machine, and I don't want to inflict that on my Mac until there is a credible threat from Viruses to the Mac, and I can find AV software I can trust. I'm not holding my breath waiting for either of those things to happen.
Top 8 OS X Safety Tips
Top 8 OS X Safety Tips