Recently I have noticed a lot of questions which always receive pretty much the same comment. The questions usually take the form
What material/technology could deal with [x problem/feature] of this [magic/future technology]
They will then quite often quickly receive a comment saying:
You used magic in the question so just say the answer is magic.
To be clear the questions are usually perfectly good questions with well enough defined magic systems that they can (and often are) be answered very easily.
An example would be the first comment here which was posted by an experienced user on a new user's question.
The intention might have been good but are these types of question helpful or harmful to the site?
I would say harmful because they are potentially discouraging to new users and make us look like a site that can't be bothered to come up with proper answers.