On the one hand, I believe information and speech should be mostly unfiltered. If people want to spread information that denies the moon landing or climate change, or extols the existence of teapots revolving about the sun, by all means. I'd rather know who they are and allow them to publicly exercise their ignorance. I assume the public would help cause a correction of the zeitgeist.
On the other hand, the fact is that some people become deeply misinformed and do things against their own interests (e.g. voting for a candidate who promises to undo systems that benefit the voter), which can effect all of us. To spare us from going into the rabbit hole of a party politics, I'll just say I read a recent interview with a voter who wants to get rid of x, even though x in particular crucially provides them a life-saving benefit of y, which they want to keep. How does that even make sense? You delve deeper, and realize that some individuals just listen to the mantra of x being advertised as a terrible thing by certain media and public figures, which is easier to understand than to go into the details as to how specifically it's good and how it specifically could be improved upon.
I'd also add technology, like the internet and smartphones, is affecting our behavior far faster than we're aware and in some ways, I think we need to acknowledge our vulnerability. When media companies or groups of websites can cheaply spread misinformation, it is VERY HARD to combat it, because good information takes time to produce and interpret.
Your concerns are entirely fair, but this also isn't a new issue. Tabloid journalism has been a problem for as long as there have been tabloids. That phenomenon is well known to be highly influential around election times among the part of the population who read those tabloids, even though often that same part of the population will be hurt the most by the measures they are supporting but don't fully understand.
It seems to me that one crucial factor is what you might call "the destruction of the gatekeepers". In politics, you had systematic lying that was intended to deceive people, and lies led directly to Brexit in the UK and Trump's election in the USA.
In the health field, we've seen systematic lying by the tobacco industry and the sugar industry, and quite a lot of deception (some no doubt sincere) in the food industry. The "gluten free" craze is one example.
There's a (possibly apocryphal) quote attributed to GK Chesterton that says "When men cease to believe in God, they don't believe in nothing but in anything."
When people cease to believe their governments, their doctors, their honest fact-checked newspapers and so on, they are easily exploited by snake-oil salesmen.
From that point of view, I'd suggest that the current problem isn't really the destruction of gatekeepers but rather swapping one set of mostly positive external influences (such as traditional journalists with strong professional ethics and critical reporting standards, and genuine expert commentators) for another much less positive set (such as online services that provide communications for the masses, but not in a neutral way, and media spin doctors as commentators).
You mentioned Brexit and Trump, which are case studies in the way people can be influenced by political campaigners, but I find a lot of the criticism of both of those results to be one-sided. After all, it's not as if the official Remain campaign in the UK or the Clinton campaign in the US were telling the truth, the whole truth and nothing but the truth either. However, there's less to be gained by fact-checking the losing side once the result is in.
Another recent example that I find more interesting is last week's UK budget. Much has been made of the announced rise in National Insurance rates for self-employed people. It's a controversial issue, because some people do exploit the tax system to pay less than they should by changing their employment status, but also because a lot of people who have never been self-employed themselves really don't understand how it works and tend to leap to conclusions that are objectively wrong. Sadly, rather than starting a potentially useful debate about different ways of working, different levels of risk/reward, and how the tax system should treat them, what has started is a discussion about how the party in power lied (because they gave a manifesto commitment before the last election not to raise the rate for this particular tax), and who can be made to fall on their sword this time to serve the entirely political purposes of who else.
In all of these cases, I think we would have been better off if we'd had a culture that fostered open debate and welcomed but looked critically at advice from those who might have more knowledge or understanding of any given subject. There are a lot of ways we could achieve that, but none of them involve communication channels that seek to influence which messages get through to promote a particular side of the debate. That threat is, in my view, even more serious than politicians who are blatantly lying, because we know some politicians lie a lot and can be sceptical accordingly, but without access to other information as well that scepticism might not make much difference anyway.
> How do you cope with the fact that a large slice of the population seeks out bad things and refuses good things?
I take comfort in the knowledge that, even if facts don't ultimately win out, human stupidity cannot affect anything beyond this planet.
Even if we end up causing global mass extinctions, life will flourish again in an eon or two.
Even if we develop some sort of planet buster and literally blast Earth to bits, the dust will reform into something else and there's an infinite number of other worlds out there anyway.
The obvious examples are US news sources such as Fox News, Breitbart and Infowars [1]. However, it could also apply to fast food eating habits.
[1] http://uk.businessinsider.com/conservative-media-trump-drudg...