The concept of getting users to accept answers to questions has been asked before, I know. The questions usually focus on punishing users in some way, prohibiting them from asking if their acceptance rate drops below a certain threshold, a wall of shame for low-accepting users (!!), etc.
Has anyone considered something much more simple? Would it make sense at all to put one of those yellow strips across the top of a users screen if they have asked > 8 questions, and have an acceptance rate of less than, say, 30%? Except of course without the button to dismiss it. Just something stating that they have a low acceptance rate, with a link explaining what that means.
The only time I've ever seen users with acceptance rates that low was when they were new users, had upwards of 8 questions, and zero accepts.