I know, that the people who post on this forum know, that the whole chemtrails bollox is bogus.
However, there is a large swath of people who are totally ignorant of basic physics, meteorology and aerodynamics who have created a whole mythical conspiracy that involves airliners.
For years I have tried to reason with these people, and then generally taken the pee out of them. Unfortunately, there is a growing number of people who are making threats (either real or imaginary) about shooting down "spray tankers". I wouldn't t normally be too concerned, but some of the general vibes these fruitcakes are putting out is getting a bit more vitriolic.
If you have nothing better to do google aircrap and be prepared to be dazzled by stupidity and crass ignorance. Try engaging with them by using logic and reason and see how long you last before you get banned....
One of my colleagues tried it and was banned after various threats from the site owners.