I see the world of information like an immune system. If your system is active and repelling threats, it gets stronger. If you are never allowed to see actual threats, your system atrophies and you become the intellectual equivalent of a native American when a European colonialist shows up at your door. Bad ideas from your own side will come some day, and if your big brother has been suppressing dissent enough, you'll accept those bad ideas like a lemming off a cliff.