Having been ticked off by Karen for being aggressive here, I am trying to choose my words carefully.   I have noticed that some newcomers to the site are intimidated by the vociferous responses.   They submit questions like people approaching the Great King enthroned in Persepolis.   I don't think my misdemeanours have anything to do with this (admittedly, I would say that).   The problem is that a newcomer enters a question that has been answered before and someone very abruptly and aggressively says so, without revealing what the earlier answer may have been.   The newcomer is compelled to resort to the useless Renderosity forum search engine, which, to be perfectly honest, gives the impression of having been unearthed in Persepolis in the first place.

If you know the answer, say it.   If you don't know, don't reply.