My popular question below was recently closed as "not constructive" and I'd like to know why. As a Stack Exchange moderator myself, I'm puzzled. Here's the question:
The question has specific answers. Just because there are multiple reasons for the practice doesn't make it a poll where any answer is valid. Nor is it a discussion. The question was a search for the variety of specific technical reasons why spaces have been avoided in filenames. The question is specific, and the answers can be judged.
I think protecting the question should have been sufficient to guard against the "me too" answers.
Follow-up question: Since this question has been closed as "not constructive", is it likely to be deleted in the future? What's the policy on this? (I know at money.stackexchange.com we tend to delete any question closed for reasons other than "possible duplicate".)