Wow is all I can say.Actually, I won't. Verbally abusing anyone is wrong.
It'll be great to see how they change the stations at BOMA the next time we're there. Hopefully no other guests will incur the wrath of someone and be verbally abused for not cutting the line to the quinoa.
You, yourself, are getting pretty rude and aggressive to anybody who very respectfully disagreed, telling them to get glasses, or simply pointed out how there might be confusion.
I agree that you might want to step back, reassess the situation and then let it go.