I have seen a lot of questions flagged as duplicated and so blocked recently, some from established members and some from new members. In several cases these have not been exact duplicates but have had some (sometimes small) difference that does not make them a direct duplicate.
While I am totally in favour of the Sandbox, is it right to directly block questions from new members as duplicates when there are so many discussions going on as to how we can encourage more people to join us?
In fact, does it actually matter if a question is a duplicate? Languages have changed and developed, new members have joined, if a question has been asked (maybe years before) there may be new valid answers to see.