> This effective backlash/education-campaign has not already happened despite there already being significant problems with this kind of thing
I think it could be claimed that we're clearly in the process of learning to distrust. People distrust media more now than ever [1], because they've demonstrated, again and again, that they can't be trusted. Trust in institutions are down to new lows [2], because they've also shown that they're untrustworthy and/or incompetent. Everyone is shouting "disinformation", "misinformation", and "fake news" constantly, because nobody trusts anything anymore, and rightfully so in many cases.
1. https://news.gallup.com/poll/355526/americans-trust-media-di...
2. https://news.gallup.com/poll/394283/confidence-institutions-...