Nielsen, I know.  The emails I get from myself, are not from me.  It is easy to check the header (not the envelope, as it can be forged) and see where it came from.  I was making a joke.
FOGOLD, many people believe that if they are running an AV program they are immune to viruses.  No Windows system is completely immune.  There is always a chance to get a virus/worm regardless of which AV program you run.
Anyone that exposes a Windows system directly to the Internet is at risk of contracting a virus or worm.  It is really that simple.