Sorry for the long title. I have noticed that whenever I have flagged a question because it was a duplicate, a comment appeared immediately informing everyone that the question was a probable duplicate. I recently crossed the 3K bar and it seems I have the ability to vote to close questions. One of the reasons I can choose is relatively new (I found a reference to it dated September 16, 2013, and I don't think it's much older):
"This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level."
If I vote to close a question for this reason, does this paragraph immediately appear as a comment below the question (similar for flags for duplicate questions)? If not, would it be possible to change the system so that it does? That would give the OP a chance to improve his/her question before it gets closed.
I am not a computer person, so I have no idea how this would be done, but the fact that something similar happens with flags for duplicate questions suggests that it is possible.
I know many people write friendly comments such as "Hello, welcome to MSE! Please tell us what you've tried, and check [this link] for advice on how to write a good question" and so forth, but so many bad, "Do my homework for me" questions appear on MSE that it would take a long time to provide this comment on every such question that one sees. Maybe a lot of inexperienced users are unfamiliar with the etiquette here, but I think a lot of users really do want us to do their homework for them. If someone posts a mere PSQ, I cannot tell which kind of user it is.