While that may be a good idea in theory it would also send all legitement visitors to those links cause a couple of things to happen:

1. I cant go to wikileaks and leak a document because my ip address will be recorded on a governement website (weird questions ensue)

2. The sites that are currently mirroring wikileaks wont have a source. So they will become out of date pretty soon.

3. People will think that wikileaks has been taken down and will forget about it.