Can't you just redirect all that stuff it sends to 127.0.0.1 by editing your hosts file?
That somewhat multiplies the problems.
If so, I suppose you have big issues with your system administration team.
Realistically we don't want to deploy a host file and AFAIK it doesn't work anyway; we want to control the network itself which we do via firewalls and DNS but it's a compromise between flexibility (our users still need to use the internet) and security.
Yes I can see how that would complicate things a little :)