Even if they read a book, they probably aren't reading books on snakes.
I always love the opportunity to talk about snakes and educate people. The more questions the better. When someone leaves after talking with me, they have a little more truth in their back pocket and a little less ignorance (I mean "ignorance" in the true sense, not in a condemning way).
I believe you are looking at this in the wrong way. We have opportunities to be ambassadors for these fantastic pets. Soak it in and be excellent, kind, and gentle about answering questions.
As I heard on another forum long ago... Don't be a "Snake Snob"