There may be a link between virus maker and antivirus company. A suspection but no proof. Every time the antivirus gets updated and the virus maker cracks them and make even more powerful virus. Virus makers are skilled but spoilt programmer. I aslo thought that if the anti virus company creates the virus, but who will prove it??? Who will bell the cat?
There already are ones out made BY the Antivirus companies. I remember running into one that would have a warning sign in your icon bar, and if you were to click on it, you'd get a nasty popup to some site asking you to download a trial version, and keep rejecting you from not downloading it. Then it'd put false warnings like "Your PC Is INFECTED!" Forget the name of this... I just got rid of it and moved on.