I've encountered a few naysayers myself. Your average person doesn't care but has been influenced by Anti propaganda to some extent. They're easy enough to correct but usually remain skeptical. Then there are the smokers. Few of them care as long as you don't proselytize. Some feel threatened by vaping and have a few self-serving gems to justify their own habit. Then there are the white knight puritans. They go out of their way to find things to be offended about and cloak their intolerance in the guise of caring about and protecting others.