Earlier quoted context omitted.
Ending the internet would probably do it. Noise goes way down when you only have x amount of news sources and outlets. We could still have things like maps, messages, etc. that are all very beneficial.
Yes, there was no ignorance or error before the Internet. Everyone operated with perfect information at all times.
The ratio of signal to noise was much higher. It helped us form a common culture. Today, the signal is buried in so much noise that we're reverting back to tribes.
No, I don't think it's realistic to put the genie back in the bottle. The real problem is we don't teach children how to think. We teach them what to think, which leads to far worse outcomes. Having an indoctrination instead of an education and then facing a sea of pretty-sounding pablum to sift through for truth will be terrible.