I think everyone knows what I mean, questions that immediately get comments such as:
"Please don't just copy your homework."
"If this is homework, please add the homework tag."
"Please don't state your anwsers in imperative mode." (or the not so often caps)
"What have you tried so far?"
"What is the motivation for this question?"
"Did you check wikipedia.com/whatever_question_is_about ?"
Lately there has been a lot of these, especially the ones that are just stated as orders to be solved. I know there is a "How to ask" column displayed while typing up a question, but I think that new users are reluctant to look at it. Furthermore, even after such comments are posted, the OPs are rarely willing to edit the questions into an appropriate format.
What can be done with this? Could the few most important guidelines be displayed directly in the page when a user asks the first question (or until any question asked gets an up vote)?