I've learned that most of the people who leave 'comments' on news stories appear to be teenagers with nothing much to do beside make wisecracks. I don't bother reading online 'comments' anymore, i just read the story and decide for myself whether I agree with it. Less aggravation for me that way.
The condensation trails are a combination of a pressure wave causing the dewpoint to = the temp causing a cloud. It is also created by the wake turbulance of the airfoil going through the air, and the by-product of combustion Co2 and H2O.... Up where the big airplanes fly, it is cold enough for water to condense or freeze instantly. Hence, clouds!