Yes Linux does have less malware then Mac OS X and Windows. It is mainly due to it having very little marketshare. It also has to do with it makes it where you do not run as root all the time. However it has been proven several times that it can be infected.
It would seem that a few of the IRS workers at the Columbus, OH IRS office that is being investigated for picking on Conservative groups have started to let the cat out of the bag so to speak. One employee has said he could not move forward unless Washington approved of the action. So it would seem that the Washington higher up are about to get hit with the **** that hit the fan.