My answer to this question was deleted.
I don't agree with banning a non-homework question showing no effort. What if someone asks a question like the Fermat's last theorem without showing no effort? This is an exaggeration, but you get the idea. Maybe you think that importance of a question is self-evident. How can you be so sure? Edit My point is that you could ban important/interesting/useful questions with the policy.
I checked this link:https://math.stackexchange.com/help/deleted-answers . I believe there's no proper reason to delete this question. I ask you those who voted to delete it or anybody else to vote to undelete it.