I could see an advantage to the system proposed by scheibkscheibk
.
People answering the question could rate the question and the associated answers with beginer|intermediate|advanced{beginner|intermediate|advanced} level. The Q/A willquestion and answer would have an level associated corresponding to the average of all of the rates.
This way, when I'm lockinglooking for a question, I could choose the associatedappropriate level. This is more useful as a tool to consult the Q/A than to select the questions I could or I want to answer, as the level is associated to the average of the response.