Safe-Keeper
My avatar is not a Drumpf hat
The early contrail accounts are pretty interesting, actually. I play IL-2 Sturmovik (a WWII flight sim) a lot, and one of the things that surprised me was that there were contrails in the wake of 40's flight groups. I always had this impression they were only products of jet engines. The more you learn... 
Actually, we should be very, very glad they are as passive as they are. When fringe nutters do take action, it very often turns out very bloody, see Timothy McVeigh, Paul Hill, Anders Breivik and the list goes on.Exactly what I say all the time. Instead of relying on "being informed" by watching youtube videos, how come nobody has launched a balloon to COLLECT SAMPLES....
