I like that on here anyone can answer. So many categories don't have experts - quizzes and puzzles, beauty, weather. In the area where expertise you attract the serious responses and get to know who knows their stuff. However other, less expert, people may have experience that is useful. There is already a reporting system and trivial answers can be removed. I have expertise in fields that I don't reveal unless I spot a question that I can contribute to knowledgeably. If there was a check on my credentials I would not stay on here.