Today I saw that this question Applying energy and momentum conservation to the problem of pulling a bent carpet at a constant speed about pulling a bent carpet was closed for being a homework question. I think this was an incorrect call that illustrates a flaw with the homework policy and the way people vote to close.
The linked question is a subtle mechanics question, where the answer depends on the precise way one models a continuously deforming object. Naive application of conservation laws will give contradictory results. The question is elegant and the setup is nice. Despite this, the question is closed with 4 downvotes.
Now, I agree it's important to protect the site from the constant deluge of low-quality questions copy-pasted from introductory textbooks, whose solutions amount to just plugging numbers into standard formulas. But this question isn't remotely one of them! There is real conceptual content here, more than in most questions about quantum field theory. The question text explicitly asks about this conceptual content; the OP has already done the boring calculations for us.
Based on this, I have no idea why this question should have been closed. I don't want to be too rude, but I suspect that experienced close voters are letting themselves slip into an autopilot mode based on cheap heuristics. They see that the question is about mechanics, and that common mechanics equations are involved, and so in less than 5 seconds conclude the question must be trivial without really understanding it. I would daresay that the majority of the close voters would be unable to get the correct answer for this problem on a first try.
Does anybody stand by the closure of this question? If you do think this question should be closed, why not automatically close every mechanics problem containing an equation? Is that really what the homework policy is meant to achieve?