The biggets problem with conspiracy theories is that they rely on descrediting existing explanations or conclusions... Which would be ok, except that they end up snowballing into some fairly exotic views of reality that an occam's razor has a bloodbath with.
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BTW, 9/11 is really overrated with who said/did/cover-upped what. Every "fact" you can bring out in support or against whatever theory or explanation you mention, in short, can't really be verified. Merely mentioning this kind of stuff in many circles will lead you to be being labeled a nutcase with no regard for patriotism, etc...
Study something more interesting that won't get people so worked up... I suggest reading about the orgins of the american education system. That is a topic which is much easier to logically debate and argue about, the facts and motivations are very well established, and people actually have a higher regard for you studying it.
The worse you can get off with is an deep appreciation for the modern school system.
Oh how I love the game of life.