Oh man, that is absolutely terrible. I'm lucky enough to have a mother who is mostly very supportive of me and at least sympathetic toward my disability. Lets just say, she had some words to say to them after this was over. I really feel you on the simplifying things I say just to avoid embarrassment. If i'm asked a question like, "Would you like a bag?" during a grocery store trip, sometimes I'll say "Yes please" instead of "No thank you" because I know I'm gonna stutter on "thank you". I've had people tell me that my disability isn't real, or is somehow illegitimate, and that I should stop caring. And while I agree with this idea on a surface level, I think it's a little disrespectful for people who aren't in my situation to tell me how to handle it, or belittle my struggle. Seriously, it's really annoying.