No need to be. Ignorance is curable.
What Antirepublicrat and Hal9000 are referring to is that the ONLY Mac viruses that have been found in the wild are viruses designed to infect OS 9 and older systems. OS X is a completely different animal than OS 9, sharing only the Macintosh name... there is no relationship beyond that.
"Tricking" any user into giving access is far easier on a Windows computer where 99% of users are essentially operating at "root" level. Almost 0% of Mac users operate at root. To even activate root on a Mac requires an effort on the part of the user, establishing a new user and a new password. On a Windows machine, until the release of Vista, the out of the box default user is root.
Tricking 1% of Windows users gives no one any claim to fame... that's so easy to do that script kiddies do it all the time. Script kiddies can't even make a dent in a Mac.
Really? do you even know how many uses would need to be duped to make 1% of the windows user base? Try it's easy to dupe .1% or maybe even .01%.
I agree it is curable. Go back and read the responses. One MAC supporter says the virus was only on OS9 the other says it was on OSX, but not in the wild. Which is it...was the virus I mentioned in the wild on OS9 or on OSX but not in the wild?