"No one can say if you are right or wrong, because no one knows"
This is much like Russel's teapot. The burden is not on anyone to prove there aren't chemtrails, the burden is on those making the claims to prove they are. Since there is no evidence for them being chemtrails it would be foolish to believe that they are.
The fact that you are getting so upset and jumping down everybody's throats shows 1 of 2, or both things:
A) you don't fully understand what you are seeing either or
B) you are emotionally unstable and get angry at people on the internet
False dilemma fallacy. Or bollocks, in layman's terms.
You are passive aggressive and distracting from the subject.