"Run a media course and ban one of the biggest and newest form of media!
So go back to (expensive) out of date books, just to do a degree course on how to work in Tesco's.."
Just because it is big, and new, does not make it accurate or reliable.
Text Books (old though they may be) are usually subjected to a peer review process that ensures accuracy. Wiki and Google have no guarantee of any such process.
The problem with Wiki? Simple. As stated above, it has no peer review process. So, I could go on there and publish pretty much anything. Sure, it has an editorial system, but this isn't the same thing. The editors are not experts on every area Wiki covers, so anyone can post any info on there (correct or not) as long as they can make it look convincing. One example of this is a forum I manage has it's own Wiki entry detailing it's history. I (or one of the other mods) have to frequently edit the entry to remove the changes made by an ex-member who has a vendetta against us.
The problem with Google? It indexes websites. Anyone can publish websites. I could publish a website giving a convincing argument on virtually any subject, regardless of how well I know it, and I know it'll be indexed by Google, and turn up on someone's google search.
Research on new media is fine, as long as you verify anything you learn via new media elsewhere. In my experience, most students (and doing tech support in a Uni, I've met a few) don't bother with this.