Have you tried the Google search at the top of each page? I can't speak for others but generally it works well for me.
Personally I'm not phased about asking (or answering) questions that have already been asked - unless it's the same person asking the same thing over and over and over and...
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Generally someone will remember a previous thread (on this site or another) and provide a link to the thread.
As for those suffering from "quiet frustration"... forgive the rant, those that know me will know that I don't often do this... but come on people, if you have a problem speak up instead of sending little messages around to the wrong people and not solving anything. We're not psychic. This is not a police state, you may have an opinion, and you may voice it. Rant over.
Rudi