How should we best deal with questions that are easily Googleable or not very useful? A downvote and a comment? Flag it as low quality? Something else? This for example: Who is the person behind Ethereum?
The idea of Stackexcange network sites is to generate and provide content better than any other site out there. It's totally legit to ask quetions which are google-able.
In future, the challenge is to create outstanding questions and answers. The result will be that google mainly yields results from the Ethereum SE site. And if that happens, questions can be closed as duplicates, if they are google-able, if you know what I mean.
As for the Vitalik-question you linked, it's simply off-topic in my eyes.
Don't think there's anything wrong with a question being googleable. After all, ideally most of our future visitors will come from web traffic. The problem with that question is that it doesn't meet the criteria of being "based on actual problems that you face".
Questions with extreme lack of research shouldn't be encouraged
In some sites, they are downvoted but not voted closed; and others prefer to close them off.
And the question you have linked to, in your question is completely off-topic in the site!