Good for you, Evening. So many times I have seen people who have fewer problems than you have simply sit back and let people bully others because they think they should "mind their own business, etc." Remember, people who do this stuff in public are counting on everyone else bing the complascent audience in front of whom they cana humiliate others. I know that anger is scary, but sometimes it is right. A tantrum in public IS making the issue in question public business. Otherwise she would go home and spout off there.

Wonderful that you didn't cry, also. Way to go! I know you probably felt bad afterwards, but there is no reason to sit back and be one of her victims instead.
HUUUGGGS!