Not a cheap shot at all.
She taught me the mark of a gentleman/woman is to treat those serving you with the utmost respect and dignity.
She also taught me never to steal, which is exactly what you're doing when you accept service, but not only refuse to pay for it, but leave your server to pay the taxes on the expected tip (12%) so they actually lose money for the "pleasure" of serving you.
How someone could get to adult life without knowing that is a real puzzler.
> How someone could get to adult life without knowing that is a real puzzler.
Passive aggressive nonsense. Your mother did raise you poorly.