Google 403 error pages

[mary]

> the easiest way to fix this would be for google to establish a
> whitelist of machines that are unlikely to suffer from virusses (ie.,
> a list of all google exit nodes and perhaps others), and not to send
> warnings to those.  any reason why google should be refusing to
> implement this?

What would be the point of this?  All systems are subject to virus 
infection, root-kits, malware, et al..

-m