It’s funny how people make things out to be worse then they really are. The PC-centric websites seemed to enjoy poking fun at Mac users when Mac Defender became a “problem.” But reading through Apple’s directions on how to uninstall the malware, it’s not much of a problem at all. Especially if you’re smart enough not to input your credit card information into software you know nothing about that claims to fix a malware infection that you don’t actually have.
Basically, you quit the application with Activity Monitor, drag the app to the trash, and remove it from your login items. This is nothing compared to the really awful malware infections that some (most) PC users experience.