"Caldeira said. "I felt it was important to definitively show what real experts in contrails and aerosols think. We might not convince die-hard believers that their beloved secret spraying program is just a paranoid fantasy, but hopefully their friends will accept the facts.""
I doubt they will convince any conspiracy theorists. Often, the opposite occurs, i.e. 'the backfire effect': when they are approached with factual evidence, they end up feeling more strongly about their views than before, despite however wrong they may be.