Thanks for laughing at me. If you'd like some tinfoil, I think I can spare you some.
These flights pass overhead everyday here. Some days they leave contrails that stick around, other days those contrails vanish. When you know what's flying overhead, by using an app like I shared there, and see a contrail sticking around after, you'd have to be delusional to think a jet that you know is flying from London to LA is trying to kill you. The jets will continue to fly, every single day, but the weather conditions will change. You can then predict which days the contrails will stick around and which days they go away. You can do it all on your own if you actually did your own research.
Air is much like water, hence I mentioned the boating. The jets stir up the air just like a propeller on a boat and a similar phenomenon is left behind. What's so wrong with pointing that out?
Why do you think a contrail is "spray"? You heard it on the internet and refuse to look into it further. Art Bell was the first to bring up this idea of "chemtrails." His radio show was meant to be entertainment, much like those tabloids we see on the magazine rack about Elvis being an alien and still alive. Yes, I realize people take those "newspapers" seriously and I know the internet has the same effect.
I'll just end it by saying, I know weather experiments exist. The problem is, people now think every contrail that sticks around shouldn't be there when in fact, many should. The jet itself accelerates the natural formation of clouds. Is that good? Maybe, maybe not. Clouds don't hurt us though, and jets can't block out the sun.