Have you not seen the so called "aerobatic" teams spray their particularly nasty concoction of Chemtrail? What better opportunity than a massive crowd of people at a special event(even the Queen cops it when they fly up the Mall!) to spray the super concentrate which only comes in red and blue. Thats why people are made to take an interest in aviation and have their faces looking upwards so they can't shield their mucous membranes from absorbing as much as possible.
You know it makes sense!