The problem with you diagram is that real contrails rarely persist for more than about 15 or 20 minutes (on very rare occasions they may persist longer but the emphasis is on RARE). Generally you watch a plane producing a contrail and following it back with your eye that only a few miles back it is already breaking up and disappearing.
The key differences on Chemtrails are persistence (they linger and spread but do not dissipate as do normal contrails), and the altitude at which they are formed. Contrails, real ones, only form at high altitude and Chemtrails can be seen to form at altitudes well below where contrails form.
2. Become incredulous and indignant. Avoid discussing key issues and instead focus on side issues which can be used show the topic as being critical of some otherwise sacrosanct group or theme. This is also known as the 'How dare you!' gambit.
3. Create rumor mongers. Avoid discussing issues by describing all charges, regardless of venue or evidence, as mere rumors and wild accusations. Other derogatory terms mutually exclusive of truth may work as well. This method which works especially well with a silent press, because the only way the public can learn of the facts are through such 'arguable rumors'. If you can associate the material with the Internet, use this fact to certify it a 'wild rumor' from a 'bunch of kids on the Internet' which can have no basis in fact.
4. Use a straw man. Find or create a seeming element of your opponent's argument which you can easily knock down to make yourself look good and the opponent to look bad. Either make up an issue you may safely imply exists based on your interpretation of the opponent/opponent arguments/situation, or select the weakest aspect of the weakest charges. Amplify their significance and destroy them in a way which appears to debunk all the charges, real and fabricated alike, while actually avoiding discussion of the real issues.
5. Sidetrack opponents with name calling and ridicule. This is also known as the primary 'attack the messenger' ploy, though other methods qualify as variants of that approach. Associate opponents with unpopular titles such as 'kooks', 'right-wing', 'liberal', 'left-wing', 'terrorists', 'conspiracy buffs', 'radicals', 'militia', 'racists', 'religious fanatics', 'sexual deviates', and so forth. This makes others shrink from support out of fear of gaining the same label, and you avoid dealing with issues.