Doesn't surprise me in the least. That is exactly what I have seen in real practice here. I think they are suffering from culture shock. Deaf people are treated badly by the hearing on a daily basis, yet the hearing expect to come into an environment where Deaf culture thrives and be welcome with open arms. I find the hearies to be far more rude than the Deaf here. I wish I had a nickle for everytime a hearie told a deaf person that they were wrong about something to do with their deafness, or discounted a deaf person's experience, or try to play the expert after having been the parent of a deaf kid for 4 or 5 years and trump the deaf adult's lifelong experience.
The hearies seem to want to be able to behave anyway they choose and not be called on it. Well, sorry about that. They are on Deaf turf now. They don't get to make the rules.