...but did you notice how the entire scenario presented in this article is predicated on the person who made their suggestion actually getting a response?
"I'm sorry, but hotdogs don't really fit our sushi menu, and while you may not care for unagi, we picked it for a reason. But thanks for the suggestions!"
Totally reasonable response. Polite. Reasonable explanation. 10/10 response. Totally unreasonable to then start insisting that hot dogs be added.
The example scenario isn't "person asks the waiter for a hot dog; waiter just keeps walking past them, blanking them as if they don't even exist".
I would be curious to know why OP chose to post this today, 3 weeks after they said they were working on it. That's an interesting detail.