What was the worst interaction or general situation you've experienced as a person who stutters?

What was the worst interaction or general situation you've experienced as a person who stutters? There were many of them for me but the one that messed me up the most happened when I was about 11 years old. A friend of my mom had a daughter with whom I loved spending time. One day, while we were hanging out, she told me that from now on, we had to hide because her mom had forbidden her from hanging out with me because I stutter and it's 'contagious.' Apparently, she stuttered in front of her mom, and her mom slapped her and told her she couldn’t be friends with me anymore. In that moment, I lost faith in people and in myself. To this day, I can’t forgive her, and I believe I wouldn’t be this insecure if she hadn’t been so stupid and uneducated. I really can't believe people like that exist.