I cornered a Symantec employee on this subject. Just before the guards were called in, the answer that noted why they didn't was uttered...
"It's not a virus."
There is also some corporate legal issues about removing other people's software automagically. As such, this may take some doing and maybe a sea-change to see the Antivirus vendors to evolve from virus protection to a "System Protection" enterprise.
Bob
People need to mass mail requests to Norton Symantec and other antivirus software producers to include anti-parasite codes into their antivirus software.
It is garbage that we have to put up with the kind of trash that is being organized against computer owners in this country.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic