It's rude to not thank someone for serving you.
Bill was at a restaurant and Jane served him his food, Bill thought Jane did a poor job.
Bill wants to react to Jane's service.
Despite the poor service Bill still said thank you to Jane.
"Bill gave no response beliving in ""if you can't say something nice...""."
Jane thanked Bill for the politeness but felt she should apologize for being late to Bill's table.
Jane thought Bill's silence was rude for not saying thank you.