I try to think as pragmatically as possible about things. The first time I ever heard of "chemtrails" was around 2009 after I'd started dating a girl who was originally from the west coast. I'd never seen anything like she was describing in the western PA skies, so I mostly dismissed her claims as moronic rambling. I did start to observe the sky on a regular basis though, and for years (when it wasn't overcast) all I saw were regular contrails behind jets, and regular cloud formations. I even googled what chemtrails are "supposed" to look like, and never remembered seeing anything like that above my area. Then around 2013, I started noticing it. During the summers of '14, '15, and '16, it was commonplace for the morning sky in my area to be absolutely covered in persistent contrails, often in a sloppy grid-like pattern. As the day wore on, the trails would expand to encompass the entire visible sky in a milky white haze. Sometimes persistent contrails would continue to form well into the afternoon, below the "haze" created earlier in the day. Often times they'd cast a dark shadow on the haze itself. It was really weird. One day in particular during the spring of 2014 stands out among the rest though. The haze had already formed by around noon, however the air traffic continued heavily into the afternoon, creating a secondary grid pattern under the haze. It was like nothing I'd ever seen before. People were pulled off on the side of the road taking pictures of the sky. I stopped in a pull-off area and talked briefly to a guy who claimed to be a retired commercial pilot. He was as baffled by what he was seeing as everyone else was.
I started to pay close attention to what days of the week this phenomenon was occurring, and realized that I never saw it on Sundays or on holidays. I also noticed that the aircraft that were making these persistent contrails seemed to be flying much higher than other jets. I looked at daily online air traffic maps which show spaghetti lines of all the commercial aircraft for any given day, and the lines didn't jibe with what I was seeing in the sky. I also did some research and learned about David Keith and his research. It sounded almost exactly like what I was seeing in the sky above my head most days. Then last spring and summer, it all but stopped. Even though we had a ton of precipitation here in 2017, the majority of the sunny and partly cloudy days felt brighter and warmer than they'd felt in years. Why the change? Also...not to sound "conspiratorial" or anything, but the whole "2 versions of the Sound of Music" thing is really freaky.
For some people, conspiracy theories on the internet are like a sport. These people get all hot and bothered trying to either prove or debunk things, to the point where it actually affects their moods. It goes hand-in-hand with how confrontational of a society we've become in general. Everyone knows they're right about everything, and they perpetually argue and fight about every topic imaginable. Personally I couldn't care less. I don't really like humanity as a whole, so people's opinions and world views mean absolutely nothing to me. If anything I'm merely trying to disprove what I've personally seen with my own eyes because I find it rather disturbing. If there's a logical explanation as to why I've been actively watching the sky since 2009, and only noticed these things between 2013 and 2016....I'm all ears. If there's any evidence that they existed in the 80's or 90's, then I'd love to see it. I'd love to see the classic persistent contrail "grid pattern" from a 1980's or 90's photograph. The internet has yet to produce such evidence though.