IMO, this has far more to do with corporate control of the net than preventing a browser hijack.
The links are modified to a degree that editing them so they actually work is like needle/haystack, especially if the poster has named the link rather than just pasting it to the post. eg
NoScript - JavaScript/Java/Flash blocker for a safer Firefox experience! - what is it? - InformAction vs
useful firefox site
In the former, a user can at least c&p the relevant parts of the link. In the latter, not so much.
My latest hosts file update actually blocks the viglink site, without my having to add anything.
I've found that disabling/prompting for active scripts on a page (there are add-ons that do this very nicely) stops drive-by downloads dead in their tracks.