Apple dares to speak of anti-virus

With a date of November, comes something to fire up the Web. Apple has dared, in a note to speak about antivirus, and worse - advises the installation of protection software.
This note goes against at least one Get-a-Mac commercial and breaks a taboo that we all know extremely well as each viral alarm causes an outcry on the Mac forums.
The question thus arises. Is it necessary to have an antivirus software on a Mac?
If you are a paranoid sort, yes certainly. On the other hand, if one refers to alarms that have been seen since Mac OS X was released, not really. Without going into details, all attacks are in fact Trojan horses, which need a user password to act. Any person using a bit of vigilance will understand that there is a problem and will refuse to give it. On the other hand, some people may enter the password, and this will be the starting point of problems. In short, some will need this kind of software not to protect their system which is low risk running alone, but to protect the system from their own ignorance and their credulity.
Attention, this does not mean to say that under OS X that there will never be more pernicious attacks, all is possible since an operating system and its appendices are composed of hundreds of thousands of lines of code. Thus, if you have fears, adopt such an umbrella. You will have much less chances of getting wet in case of a sudden storm.
[Update] Apple seems to have withdrawn its note dring the night, proof that it caused a disturbance.