I've thought about these questions a lot, since I'm in a relatively technical field. I am not sure if we are seeing the failing of education, especially in technical matters now that everything is done by pushing a button and not understanding what is behind the button, or whether it's just that the people who have always failed have become more visible, thanks to the internet.
Perhaps the old photo magazines filtered out the really bad questions we get to see now. I'm no longer surprised to see posts something like "I understand developers are alkaline, and lye is strongly alkaline. If I develop my film in lye will it be really fast?", but were those people always around? I'm not sure. I do know that bad photographs and bad ideas have always be around.. My own specialty has been infested with pseudoscientists trying to inappropriately leverage technology as a shortcut to knowledge ever since the birth of the Industrial Revolution, literally, so I suspect that bad ideas have always existed, but that the internet has given everyone a self-publishing platform, where everything is more visible. I see a lot of people who can't tell shit from Shinola believe we need to hear from them.
In direct response to some of the posts above, I have noticed that sometimes people with the really worst ideas are very defensive about them: "Don't fence me in, you bully," they say. A lot of the time, not always, they've learned defensiveness as a strategy because they're idiots and naturally get attacked a lot. This isn't always the case, but it happens enough, especially on the internet. Dunning-Kruger Effect comes to mind. . .and they have a way of taking over the discussion, if permitted.