The challenge today is that, not only are new members not aware of the search feature, it is sometime hit-or-miss for those of us who know how to use it. Fortunately, the Fluther staff is working on it. In the meantime, certain links to old questions are helpful, depending upon what the OP is looking for.
I’ve seen appropriate examples of providing a link to an older question is very appropriate, like bob’s link in this response. There was another post by a Jelly linking back to “The Fluther Proposal” when the question was about who had the highest amount of GQ points for one question.
It also depends upon how it is delivered. I asked a question one time, and JLeslie gave a wonderfully hospitable response with a link:
You may be interested in a question I asked a very long time ago http://www.fluther.com/55393/do-you-find-it-annoying-that-people-who-live-in-the/ basically asking the same thing. Although I am interested to see what new answers you get.
When a link to an old question is provided with a comment that says, “You might be interested in this”, or “Here we go again…”, it makes some people uncomfortable, especially the OP. There is always the option to send the link to old and similar questions to the OP via a PM, thus creating a potential win-win situation.
I’ve read questions that have been asked before, and I either pass it over or reply (occasionally giving a different response then the one on the earlier post). Often, the new question has a subtle difference, so I find it important to read into what it is that the OP is actually looking for.