A lot of the local newspapers have abandoned third party comments systems and gone for only allowing comments under full verified name (often using the national id system). The result is that only the trolls and and generic perspectives anyone could have reasoned their way to possibly existing in less than 5 minutes remain. The ones willing to provide entertainment in the form of vigorously refuting the more extreme viewpoints are gone, because who wants to needlessly antagonize the likely crazy, and the interesting tangents are also mostly gone.

If you want to use social media to chill out with your friends, real name mandates for writing can work, at least as long as the content is not too publicly accessible. But if you want to have more interesting conversations than the ones you can have in the local park where you need to watch out for not publicly denouncing the sport favoured by your peers and neighbours in favour of something locally exotic, real name by default will more or less wipe them out.

As for proof of humanness it sounds interesting, but I think it's insufficient. Much like I dislike promotions of interests which are not my own as much when they are done by a human handing out fliers vs a poster showing the same advertisement, I don't think that the sender of the message being a paid or otherwise recruited human is going to make the desirable difference on social media either, even if they're known to be human.

What's really needed is a signal that the content is the persons genuine personal input, and comes without an ulterior agenda. And if such a signal can exist I'd very much like to be able to use it when navigating the physical world as well.