From what little I know of US Government IT security, they do take stuff like this seriously. And I wasn't being entirely serious (hence the
) about Google Apps.
One person in the US State Department I know of has to use a completely separate PC in a separate part of the building, on a separate network, for personal use.
And I've seen nothing in the press / articles / stuff going on in the company I work for to indicate that people *were* accessing their mail accounts from computer systems which shouldn't really be connected to public networks.