Why do many people dismiss "chemtrails" as a crazy conspiracy when there's historic events events like these?

Question by dumdum: Why do many people dismiss "chemtrails" as a crazy conspiracy when there's historic events events like these?
The spraying from planes of toxic CADMIUM over England--without people's knowledge! And the government waited for years and carefully documented cases of cancer deaths and made maps of the cancer cluster in that area--which was much higher than the national average.

http://news.bbc.co.uk/2/hi/uk_news/england/norfolk/4507036.stm
http://www.familiesagainstcancer.org/?id=297

With cases like these, why do many still assume that this could never happen again?
Cody The Conservative: I don't think it's a waste of time because the more people who know, the more people will be united and can have more power to change things. If it's only a few people, they can continue to ignore the complaints and concerns by saying it's just a "conspiracy theory."


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