As for the Internet, imagine a system where every server has to go through The Big Machine, replete with filtering software to detect any messages that hint of any opposition to The One. Only connections through The Master Server would be allowed.
Sure, clandestine radio stations and servers would crop up here or there, but with all of the power of a bloated and massively expanded Government at his command, Obomatron would stomp those out. Fear will keep the locals in line.
With high tech improving itself all the time, THERE WILL be ways to fool any government attempts. It will happen, with the help of off-shoring.
They’re closer than you think.
This whole “digital TV” initiative, while innocent in its core intent (modernize TV broadcast and improve efficient use of limited radio spectrum) does exactly that: un-approved broadcast becomes difficult unto practically impossible.
One can, for a few more months at least, with just a cheap video camera and about $20 in parts from Radio Shack set up a local-broadcast TV station (technically; legally may vary). Come next February, all regular broadcasters will shut off their analog transmitters and practically all viewers will upgrade their TVs to follow suit - rendering the “$20 transmitter” solution moot, and raising the cost of starting a station substantially.
With DTV enacted and the only solution, AM/FM radio should follow suit accordingly: the cheap homebrew transmitter will be rendered moot.
Only “digital” transmitters will be allowed, and the audience locked into it. While perhaps still not totally in the grip of government, the difficulty & stakes in lone-wolf broadcasting rise considerably.
Or, they could do what they are doing with TV. Change the broadcast technology so that all existing radios are obsolete. It's amazing that they have done that with TV's, but they have. Come Jan 1, 2009 no TV will be able to receive "over the air" broadcasts without a special box.