It seems like ones that are pointless or completely unrelated to coasters get deleted, while those that are closed are repetitive or whatever. That way you can still look up stuff if you search for it and are looking for something, because usually there is a unique viewpoint or two, even if the topic has been done recently, because of the new users all the time.
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Po!nt of View: A different look at Roller Coasters.
http://www.crosswinds.net/~justmayntz/thrills/index.html ** Updated April 4, 2001 **