You're absolutely correct. Regarding deaf etiquette, that is a huge problem in the deaf community; they don't seem to realize that they live in a predominantly hearing world, and unless they can act and can write as though they live in a hearing world, they will continue to languish in a society that has a 72% unemployment rate. Sorry to be looking down my nose, but that is the way it is, in my self righteous opinion. If you want to put or place the blame somewhere, you should probably learn where to place commas first, and then you can put the blame on the school, or schools, that they attended. These schools, in my self righteous opinion, only prepared them to survive in the deaf world, and not in the hearing one. Unfortunately, the jobs are in the hearing world for the most part.
I didn't mean to be condescending, if I came off that way, I'm sorry, but I decided to point something out that I see time and time again on this site. I thought the blanket approach would be better to correct one publicly rather than PM each person as these situations came up.