You could say the same about television sixty years ago or so and that didn't work in the long run. You could also say the same about the printing press five hundred years ago or so and that didn't last forever either.
Ways to manipulate the public come and stay, they're highly effective for a generation or two and then phase in the background as the society adapts to their strengths and finds out their weaknesses. It's a normal cycle, during the Gallic wars and codification of Christianity a few centuries later assertions of greatness in writing were enough to convince the masses you truly were onto something. Today people demand more, much more in terms of evidence if you try writing it in a book and sell it as proof of your greatness, but they believe a great many things if they get them through internet. The masses will learn to distrust the internet just as well as they learned to distrust orators, pamphlets and television. It'll take a while, but we'll get there.
We're screwed in the meantime though
McHrozni