I am not willing to teach just anyone, but I would be willing to teach someone who is willing to pay attention, and learn. Usually, my answer is "No."
Most hearing folks I feel like I'm wasting my time. "Oh, I love sign. I've always wanted to learn! I'll finger spell my name!" And, that's the extent of it.
So forgive me if I'm a little jaded. Things haven't changed much in the 50+ years I've been alive.