What's the ratio of accepted answers / questions?
Think about it. There are so many questions without an accepted answer. It is annoying for all the people who invest time to help others.
I like the reputation/badges system so why not use this system to limit questions without accepted answer? For example:
- Reputation < 100: Users can only ask one question without accepted answer.
- Reputation < 1000: Users can ask three question without accepted answer.
- Reputation < 10000: Users can ask five question without accepted answer.
There should also be a flag to not accept any answer. But this flag should be set explicitly. For example in case all answers are wrong.