LDH....I agree that such webpages do a lousy job of documenting their quotes, and anyone citing them as "evidence" must do a "better job" and show that they are legit. Last year Ianone posted some anti-Semitic material on the Talmud with purported quotes of passages from it, and I similarly queried him about it since some of the quoted tractates do not apparently exist and only appear on the web in versions of the very same post he posted here.
As for David Spangler, there is a fairly balanced page on him in Wikipedia (http://en.wikipedia.org/wiki/David_Spangler) with a bibliography, and it appears that his mystical philosophy is indeed a branch of Luciferianism (http://en.wikipedia.org/wiki/Luciferianism), which construes Lucifer in a quasi-Promethean and neo-Gnostic sense as the "light-bearer", i.e. the source of knowledge and light for man. The following is supposed to be a quote from one of Spangler's books, in which Spangler seems to espouse a similar view:
"When man entered upon the pathway of self, he entered into a great creative adventure in which he took on the responsibility of a microcosmic world unto whom he is god. The being that helps man to reach this point is Lucifer. That is his role. He is the angel of man’s evolution. He is the angel of man’s inner light. Lucifer is the spirit of light in the microcosmic world. Lucifer is the embodiment of that energy. He is the embodiment of all those qualities which builds up the self: pride, selfishness, awareness of identity, love of self. Lucifer was just what his name implies - the bringer of light. It is important to see that Lucifer, as I am using this term, describes an angel, a being, a great and mighty planetary consciousness" (David Spangler, Reflections on the Christ, 1977, pp. 37-38; cited [here])
He also says: "Christ is the same force as Lucifer but moving in seemingly the opposite direction. Lucifer moves in to create the light within through the pressure of experience. Christ moves out to release the light, that wisdom" (p. 40). Of course, these quotes have to verified with the original book, but they seem to be pretty representative of Luciferian philosophy. So it does look like Spangler does talk about Lucifer, but in an abstract positivist sense. On p. 45, Spangler supposedly writes: "Lucifer comes to give us the final gift of wholeness. If we accept it then he is free and we are free. That is the Luciferic initiation. It is the one that many people now, and in the days ahead, will be facing, for it is an initiation into the New Age". This comes very close to the purported quote:
"No one will enter the New World Order unless he or she will make a pledge to worship Lucifer. No one will enter the New Age unless he will take a LUCIFERIAN Initiation." (David Spangler, Director of Planetary Initiative, United Nations)
Perhaps the purported quote comes from the same book, but there are a few important differences that cast some doubt. Spangler wrote of a "Luciferic initiation" rather than "Luciferian initiation" on p. 45, so it is not clear if he used both expressions. I'm not also clear if Spangler speaks in terms of "worshipping Lucifer". So the quote may have been "massaged" and it is suspicious that in its many appearances on the web, I have not seen one proper citation.