eelixduppy - 1:16 pm on May 2, 2010 (gmt 0)
You are right in that computer security has to address issues surrounding the "human factor" when it comes to preventing threats; just look at phishing, for example, that relies solely on tricking someone into disclosing information. Likewise, if someone is going to do something that allows malicious code to run on their computer, it's going to happen irregardless of what operating system they have. Third-party applications also would have some bearing as to whether or not a system is secure on the web (e.g. web browsers and plug-ins).
But regardless of how secure OS X is or isn't, it is still ignorant to think that there is no need to worry about any threats.