Friendly worms

I was just reading about the latest worm that installs a rogue SETI@home client, and it occurred to me that worms could do good as well as harm. I know that it would upset a lot of people, and possibly cause some damage of it's own, but imagine a windows worm that installed the microsoft patch to pluc the specific vulnerability that it exploited. Microsoft could release such a worm every time a vulnerability was discovered.

This would of course only be useful for exploits that allow code to be executed or files to be installed.

People who know me know that I intensly dislike most Microsoft implementations of technology, but I think it is instructive to how we operate as people that if this technology came from, say, the IBM research labs, it would get positive page 2 or 3 IT press reports. If, however, it came from Microsoft, it would get page 1 negative reports - but be implemented anyway.