The vast majority of people who write the most common low-quality questions are not going to read this page at all. I think the people much more likely to read this page are those, especially graduate students, who are very nervous about asking a question on MO. They need some encouragement and some advice on how to present a question to ensure it is well-received on MO. In particular, if you are not sure if your question will be well-received, some of the best things you can do to improve its chances are to explain how the question came up, and explain what you have tried so far. I think this advice, and any other helpful advice along similar lines, should be near the top.