I won a free lunch at Peking from my 4th grade rebbi after getting tested on mishnayis baal peh. The restaurant was located across the street from Rabbi Dessler's Hebrew Academy of Cleveland.
A week after came word that they were serving treif and I felt angry and sick over for a very long time.
?זו תורה וזו שכרה
And it happened in HAC's backyard? Under a vaad that arranged boycotts for restaurants that dared use another hashgocha?
The owner never asked forgiveness from the community, but in time I forgave him. Financial troubles can make people do awful things.
The vaad never said outright that it was treif, but said to kasher dishes, etc. To this day, my mother only uses plasticware on take out food.