The fatal flaw in almost every conspiracy theory is the sheer numbers of people who would have to not only conspire but keep their mouths shut, something that us humans have never been able to do.
Look at contrails / chemtrails as an example. They have been around since the first plane flew high enough to encounter extreme cold. But lets look more at the time span that the chemtrail crowd likes, the last 10-20 years.
Think about the numbers of lips that are involved.
You would have to start with those who are behind the scheme, letís use a conservative number of 1,000.
Next you have the administrators and contractors, again conservative 10,000.
Now you have all of the pilots over that time 500,000.
Next we have all of the ground crews and support 5,000,000.
It just keeps getting bigger as you get into all of the people involved in manufacturing the chemical agents. Over 15 years it would be tens of millions.
Does anyone really believe that that number of people could keep quiet for that length of time?
I certainly don't!
It is rare that a group of 10 people, all with something to loose, manage to keep a secret very long.
With chemtrails you have tens of millions and for the most part they have nothing to loose by revealing what is going on, and most would gain since they would be just as subject to the fallout as everyone else.
Anyone who wants to really crack the truth, good or bad, can do it quite simply.
Wait for a day when there are lots and lots of trails and set out a empty, sterile, large jar, something like a mayonnaise jar, with a plastic lid. Leave the open jar in a location that is unlikely to gather much dust overnight, then put the lid on.
Take that jar to a lab and have them swab the jar and analyze whatever they find. There will be some dust so there will be some trace levels of the things one would expect in dust.
But if the chemtrail myth is true you should show extremely high levels of aluminum and barium along with the supposed biological elements of spraying.
One final point about the chemtrail theory; If this has been going on all of these years how do you explain the lack of response by the victims?
Certainly people would be dropping like flies in the heavily sprayed regions. But the fact is that Americans are living longer and healthier than at any time in the past.