I see it every day. Questions gets closed by three or four users who are not related to that topic or tag. They find "marked dupe in
Review section" and start the race to earn gold badges.
See this question, this is not dupe, and even marked dupe to a question which does not provide an answer either.
And then we will asked in such case vote to reopen. But I think the percentage of reopened questions are very much less.
Should any restriction be made that, users having XX reputation points on a tag can close a question tagged with the same?