I don’t know of any strategies how to deal with these myself. After my stutter I just explain, that I do stutter.. It just helps me to remind myself that how I speak does not reflect my capabilities. And even when many people look down on me and are behaving rudely, that it is just because they do not know about stuttering and I hence can’t blame them for their lack of empathy. Don’t let this ruin your day ! Better to stutter confidently, then running away.