After seeing many many videos on youtube proclaiming to be about chemtrails, I have given the matter some thought.
One single trail is not a chemtrail.
A few criscrossing trails aren’t either – unless they form grids. Square. With equal distances between trails going in the same direction – and trails (equally distant too, in the same direction) covering these at a 90 degrees angle. To ensure a systematic coverage of an area.
Observing this, the craze about them gets a bit abated because those grids, while I have seen them here, are much rarer than simply wildly crisscrossing trails.
Nothing they do is left to chance, so why would they wildly criss-cross spray and endanger the results by risking to not get an even coverage of the target area?
In my area, night flights have been banned (I live quite close to an airport). The official reason was to reduce the noise pollution in the night, so as not to disturb the citizens’ sleep. As if they really cared about that! Fact is that quite often, in the early morning, at sunrise (and you have to be up early to catch it, a bit too late, and it’s almost gone, and of course the sky has to be clear of other clouds), the sky is full of grids. So I think the real reason for the ban of the night flights is to keep the area over the airport plane free so the sprayers can do their job undisturbed and unobserved. I don’t think they take off or land at our local airport – we’d hear that – they must come from one of the border areas, and my best guess is Germany, but who knows. Also, if they took off here, they would not be high enough to leave the trails where they are found in the mornings.