Okay, first off let me ask you, AC, why hiding behind a mask?
Isn't it because you're affiliated to the celebrated company we're commenting about and which should shut the fsck up to properly enjoy all this humiliation?
Now you can see that wasting money and soul on pretty dirty campaigns like patent trolling, "droidrage", "scroogled" and other extravagant spendings is not justified at the end. Microsoft would not be so vigorously ridiculed these couple of days if they had just hired a single competent expert, not another manager or lawyer. It would only take one sane ssl brain!
As to what you're trying to allege now, I've done hundreds of times already and will repeat this for you again, the unknown friend.
When you and others try to surmise about someone's theoretic interests, you should prefix it with IMO (or better IMHO). Since you're making a statistical supposition that the risks and popularity are correlated, so tell us about the nature of this correlation. Is it linear ?, polynomial? logarithmic? what are the corresponding coefficients? Yet, I remind you again that, Microsoft strongly recommend AV software. On ANY setup, be it a specialized server or desktop. Now, according to netcraft, non-windows setups facing Internet are the majority. So there should be an explanation in your theory shedding some light on this paradox as well.
Yes, Linux, BSD and other servers do get hacked due to
** weak ssh policy
** insecure cgi applications, mostly php-based
** some ad-hoc sql incompetent proprietary products
No, AV is a bad idea. MAC is a much more professional solution against 0days and other threats.