"Microsoft researchers are working out the perfect strategies for worms to spread through networks. Their goal is to distribute software patches and other friendly information via virus, reducing load on servers. This raises the prospect of worm races — deploying a whitehat worm to spread a fix faster than a new attacking worm can reach vulnerable machines."
A good idea, isn't it? (Though the concept is quite old) but still it is worth a consideration. Imagine infecting yourself purposely by a worm and feeling good about it. :)