This recently released add-on for Flight Simulator 2004 shows some quite realistic, yet slightly odd-shaped contrails. It's entirely possible that photos made with this might start showing up in "Chemtrail" postings.
http://secure.simmarket.com/esc-xtreme-contrail-fsxfs2004.phtml
http://secure.simmarket.com/esc-xtreme-contrail-fsxfs2004.phtml
Last edited: