Hannelore: I don't know how the process works so I may be suggesting things that are already in place.
Instead of people asking questions, a set series of questions should be posed. These questions should be of general interest to all. They would cover the basics.
Next, people are free to submit up to three questions. NOT ALL questions could get asked, "What is your favorite color" isn't an interesting question. It tells you nothing about the person. Questions of substance are far more interesting. AND since people know which questions would be posed from the initial set of questions (a pre-determined set) they can avoid asking those general questions.
All this may be moot since with BK 3 there will be no more public boards.
to act as a proxy and answer question on behalf of any interviewee that might be lacking in time. I should mention that I have a random-answers-generator so there could be some confusion on some of the questions. But I can answer most 100 questions questionnaire in less than 30 minutes.