First of all, I was looking if such a topic existed already, but I couldn't find anything. I'm sorry if I missed it.
Relatively often, you will find a question that is just painfully easy to answer. I will make up one example, I could link questions if somebody doesn't know what I'm talking about, but for now I don't want to offend anybody of course ;).
In my world, there is no coffee. What will people drink instead?
And the answer would be something like
So as for other SE, I completely get this sort of thing. If someone asks on physics why things fall towards earth, gravity is a legitimate answer. The OP might have never heard of the concept for a number of reasons and it's best to educate them. However, I fail to see the purpose on worldbuilding.
I had the impression the SE is there to help building worlds and not to build them because the OP can't do a basic google search or write a decent question.
I know some of those questions are insanely popular, I believe because anyone, even the gravity guy, is able to answer them. However I think especially because of their popularity, they also cast a bad light on worldbuilding and attract more trivial questions.
I recently flagged one of those questions (working on being able to closevote ;)) as too broad I think, however it was declined. I get it, why should asking about other drinks than coffee be off-topic if worded nicely, it's just trivial. I also answered one of those questions and got a lot of upvotes for my trivial, easy-to-google answer because of course the question went viral. It felt kind of bad tbo.
Many of those questions can be saved by asking for more information because the OP didn't want to hear about water but about something else, but not always. I'm not talking about sloppy questions in general here.
What should be done in case a question would be very easily resolved by a simple google search, 5 minutes of thinking about it or doing any research into the topic themselves?
What should be done with questions that have rather obvious, trivial answers? And are they on-topic and welcome?
And for me, personally, this question is important:
Are comments asking the OP to exclude the trivial answers to the question even desired or should I stop doing that?
There are different kinds of flavors, I want to include a third point:
What to do if answers are not necessarily trivial but so well-established that the OP must have encountered solutions to the question already. E.g.
How would medieval people react to someone with technology that looks like magic to them?
has been done and overdone so much that the standard answers should maybe be excluded. I feel like this question could actually be a fruitful one even if one excludes the cliches, but often these questions only yield more obvious, cliche answers and the rare creative or, perhaps in this case, historically acurate ones gets burried under 10 answers about burning someone alive.
This of course doesn't has to be the case, often creative answers can be found with many upvotes, but I'm talking about such questions in principal here. I personally feel that a question excluding the obvious answers is strictly better and the obvious answer spam hides and, I know this from personal experience, discourages the new/interesting/alternative solutions.
What to do about questions that do not exclude well established, run-of-the-mill solutions?
Let me know if the 3rd point should be best left to a separate topic.
I realize the subjectiveness of this, but everything is subjective to a degree.