I don't think its fair to blame windows system's for the ineptitude of its users. If they just keep their system up to date and have the common sense to refrain from downloading 20_free_happy_kitten_emoticons.exe then windows is fine for Bitcoin. Just wait until someone builds a wallet sealer for Mac! Oh the profits they will reap, and that's a BSD based system!

Linux's biggest advantage in security is that it's a small user base (relative to windows and mac) which is further divided between distributions. Plus, being a less popular system that only became readily available to the average computer illiterate Joe in the past couple of years, a large part of the user base is to advanced to fall for simple tricks. Leaving attackers with a very tiny target that simply isn't worth the effort while windows and mac exist.


PS: I love your avatar. Praise Bob!