One of the most surprising thing I remember is when I was a student, I met a lot of students in the deaf community (I was an exchange student at RIT which has interpreters in classes) and a few of them felt that the Cochlear implant was a threat to their culture. They were worried that it would signify the extinction of deaf culture.
It's similar to the worries of deaf parents having a hearing child and not being able to connect with them and have less shared experiences.