Since "chemtrails" exist only in the imagination, you will be unable to tell the difference between contrails and...contrails. There is no objective signature. Contrails can vary all the way from invisible to thick. They can dissipate quickly or persist for long periods. They have no sensible effect on sunlight (just the other day, I saw a fine contrail...and turned my head 45 degrees to see the sun shining through a gap in the clouds). Flying as you suggest would be close enough to be prohibited by the FAA (and possibly be quite dangerous, as you would be getting into the leading airplane's wake). "Intercepting" and "grounding" any aircraft qualifies as domestic terrorism, kind of comparable to kidnapping and imprisonment. Stupid and evil.
Since "chemtrails" exist only in the imagination, you will be unable to tell the difference between contrails and...contrails. There is no objective signature. Contrails can vary all the way from invisible to thick. They can dissipate quickly or persist for long periods. They have no sensible effect on sunlight (just the other day, I saw a fine contrail...and turned my head 45 degrees to see the sun shining through a gap in the clouds). Flying as you suggest would be close enough to be prohibited by the FAA (and possibly be quite dangerous, as you would be getting into the leading airplane's wake). "Intercepting" and "grounding" any aircraft qualifies as domestic terrorism, kind of comparable to kidnapping and imprisonment. Stupid and evil.