There are questions floating around that are researched to a point but essentially are just asking for a specific article. At best such a question looks like this one.
I understand questions that ask for an explanation within literature are why these sites exist, but to ask for a specific article seems very much the equivalent of "I can't be bothered to look through the documentation, can you do it for me?"
The odds that anyone has already covered this paper as part of a project is slim. The odds that they know the paper off by heart or have it at hand is slim to none. All it will take is a google (or even a google scholar!) search to reveal the answer, something OP could have done themselves. In other words these questions are very answerable, but expect the answerer to do something that the OP could do themselves rather than having the answerer reveal specialist knowledge.
So how should one handle posts that just ask for articles? Currently I am considering down voting and commenting rather than closing but is there already a protocol for this situation?