When I began responding to questions, it was annoying to me, too. However, I have acquired some perspective on this over the years. For one thing, there are space limitations. For another, students are often in a hurry when they ask their questions. But most importantly, they are here because they need help. If they don't know how to properly formulate a question, that is part of the help we can give them. Often I see a question on a literary text that has no indication of what the text is. I simply email the student to suggest that the student clarify, so we can answer. Who amongst us has not made a mistake?