That is a frightening scenario Shel but I only used those examples off the top of my head. Perhaps I should have used 'good morning', 'ready?', or 'awesome' as examples.
For all, here's how I got to wondering about this topic. Someone had asked me how I first got involved in the deaf community and why I wanted to learn sign language in the first place. Thinking about it took me back to when I was a very little girl in "Brownies" (an organization for little girls similar to Boy Scouts). For some reason - can't remember why - we were taught the ASL alphabet and a few very basic signs. As I grew up and went through school, I never encountered any form of sign language again nor any deafies. But, I often thought about that experience in Brownies - the way I could 'talk' with my hands had fascinated me and stuck with me. Fast forward many years to when I made a career change from teaching full time plus coaching every evening and weekends to one part-time job. I finally had some free time in the evenings. I wanted to take some sort of class at night and found out there were ASL classes. I jumped right in 
. So ... if it wasn't for the Brownie leaders introducing me to the idea that people could talk with their hands, I would never have learned ASL or met so many wonderful people in the deaf community (including one of my now dearest and closest friend and her family), and I would not have become aware of deaf triumphs and deaf struggles. It was these few simple signs from hearing leaders in a hearing environment that gave me the gift of the deaf community years later.
So, I wondered, isn't some sort of educational exposure to another language/another culture, better than none at all?
