For a second, I mistook the title of your post.... Once on a transatlantic flight, the guy seated next to me (a preacher) talked about the virtues of religeon for over 4 hours. being shy and respectful at that time, I listened (unfortunately, not quietly as he expected me to respond to his probing questions) patiently. Well, I was and am still an agnost and hours of one to one direct preaching failed to have an effect on me.
But, I have already been "converted" to Flyertalk and will preach its virtues to those who will have the misfortune of sitting next to me in my coming flights.