I know exactly what you mean. My gf works at a school for the deaf and we're both hearing.... and I'm sensitive to this pensiveness you mention. Three reasons: there is so much bad info out there, asl and deaf culture are evolving as we observe, and hardly anyone is cataloging or curating the info. There are no ambassadors. It parallels health information imo. I guess I should add the contemporary attitude of self-righteousness on the u.s. when ppl learn sth abt any other group they tend to shove it others' faces. E.g. knowing that it was Illegal to drive a car with headphones on, I once dared to ask if deaf ppl were allowed to drive. Instead if a simple yes, I got chewed out by a hearing person for my ignorance.