[RawAlex]

disinformation campaigns are as old as the hills. Propaganda in all it's forms is a very old trick, you can go back to WWI or so and find radio stations set up to send the message to the population of the opposition, claiming all is well. The Korean war was packed with this sort of thing, and to this day the US spends tens of millions of dollars each year to try to broadcast into Cuba.

Hacking websites or trying to shut down web access is a very useful way at this point to create disinformation or at least to stop the flow. Heck, sending in a bunch of geek troops to take over data centers and redirect traffic or modify websites would probably be a really interesting way to change the tide of a battle.