I believe most questions that are unanswered are unanswered because they are either poorly written or missing a question.
It would be useful for members to be able to leave either a comment or some sort of vote as to whether the question is correctly said, which would help the original poster to correct his question. People would be able to leave points for:
- I do not understand the question
- There are informations missing
- Where is the problem?
- What have you done so far that work/doesn't work?
This way, if the original poster notices that one aspect of his post is getting many hits, he might redo it in order to improve his chances of getting an answer.