it would be nice to know the experience level of those posting comments. the old website allowed posters to provide a description.
requiring a birthdate for determining an age would be insightful, indicating if the thread is posted by a high school student working on an assignment or a more experienced hobbyist
for a responder, it might be nice to know if they are professional programmers, hobbyists or students
checkboxes in profiles could restrict what is made available (student, college, hobbyist, professional coder, engineer)