I'm sure with the Snowden debacle and the truly insane way the NSA has handled the whole affair, many more people are willing to believe in some of the crazier rantings of the conspiracy theorists. From 9/11 Truthers to the Chemtrail crazies, it seems like lately these people have been coming out of the woodwork. To be fair, a little healthy distrust of centralized power is probably a good thing. To much power in anyone person's hand is never a good thing, but WOW.
It always amazes me that the New World Order is just around the corner, every time something happens. Then it's just around the corner a little later down the road. As to who the NWO actually is. . . well it's the Illuminati. Or the Free Masons. Or the Zionist Jews. Actually who the shadowy string pullers are varies on whose telling the tale. The ultimate goal of a population of automatons while the elites have total world control seems to be the only common theme. The funniest thing is that there actually was a system just like the one describe in all these various theories. That would be Soviet Russia.
But if there really is a plot to have hundreds of planes fly over America daily spraying some sort of chemical into the upper atmosphere, the question that always seems to elude these hacks is motive. What motive does this shadowy conspiracy have for "spraying" the skies with clouds that don't go away? It seems this question, much as the question of who is actually behind it always seems to make these theories fall apart. If we really blew up the twin towers, what did we gain? A war that has sapped the national will to fight and weakened US preeminence abroad? If building 7 was really a controlled detonation and not (as almost every expert who has actually studied what happened) a structural collapse due to sever damage from falling debris, what would anyone possibly hope to gain? The twin towers had already fallen. The damage was pretty much done. Everyone was evacuated, so no one died when 7 WTC fell. What possible point would any conspiracy have in overplaying it's hand at that point?
The worst part is that a lot of these seemingly rational people will take bits and pieces of statements made or photographic evidence and distort what happened. You see windows being blown out before the plane is all the way through the building so it MUST be controlled. Completely ignoring things like shock-waves, and the fluid dynamics of explosions. Fire doesn't melt steel. . . and yet since steel was first forged it was melted to be shaped by. . . fire. In all their aspersions they completely ignore how unique the WTC and the attacks of 9/11 were, and thus there is no statistical way to back up that what happened on that day happened exactly as the official narrative says it happened. People take a high school (at best) understanding of science and make wildly inaccurate conclusions about what happens, when actual experts look over said theories they're laughably simple to disprove even though the science behind it is difficult to explain to the layman.
But the conspiracies are not limited to moments of evil like 9/11 or the Kennedy assassination. Look up "moon landing" on Google and i bet you at least one of the suggestion Google provides will be that the whole thing was a hoax. Despite the fact that the Mythbusters went out of their way to prove that in fact we did land on the moon, and most of the "evidence" pointed to as conclusive proof is actually easily explainable, people still refuse to admit that yes in fact we sent some truly brace souls to our nearest celestial body.
Here's what I think. Aside from the truly crazy, the reason that most people believe these things is that their world is ordered. Things go on much as they have, and even though world events might touch them and shape the world around them they are not actually a part of said events. If the price of milk goes up they see it a a slight against them, and not actually having to do with a complex formula figured out by the companies making selling and delivering the milk so that they can provide the product safely economically and actually make a buck in the process. When terrible things happen for no apparent reason, or the reasons defy logic, our rational brain often searches for some reason that can "make the pieces fit" even if the picture itself makes no sense the pieces fit. What people often fail to realize is that its the order we force on the world that's the illusion, not the chaos. Nature is naturally chaotic, and only human society imposes things like the traffic grid of New York City. When chaos strikes our lives that order is shattered and we are left scrambling for anything and anything to restore that sense of order which can often lead to people believing in things that simply aren't.
Sadly with the creation of the internet these folks will find each other and reenforce each others crazy. Such people are *usually* not dangerous, but they can be destructive to a society if they reach great enough numbers. After all Mien Kampf is one of the greatest examples of a conspiracy theory that caused unimaginable harm. It is therefore the tired and sad (also thankless) duty of people who actually remain rational to point out the flaws in the logic of these theories. To point out how it can not possibly work in the real world, or that they're making mountains out of molehills. It is tiresome but sadly vital to continue to ensure that rationality wins out in the end.