A lot of conspiracy theories are hair-brained, but a lot of stories sound wilder than fiction before they are proven to be true, too. Take the WTC, I personally doubt those airplane crashes caused them to just fold up like that (don't just react until you watch AND listen to what these videos are actually saying. There are four parts):

http://youtube.com/watch?v=JWpWc_suPWo

I don't know if anyone planned the downfall of this country or not. I do know this, we look dumber than dumb for consistently shooting ourselves in the foot, day after day, year after year. So many of the problems we have have been brewing for a long, long time, and yet we haven't changed our course. We'll see what happens. Maybe the economy will just bounce back, but people who don't thinks so don't sound crazy at all.