In opening your dining rooms for business, you are essentially making a contract with your patrons. You honor your end of the deal, they honor theirs. Pork is not veal.
Pork is a substance forbidden by certain faiths.
To substitute pork for veal is to violate not only a public trust, but also some deeply held religious beliefs. When you own a business, it is your responsibility to know what's on your menu and to stay on top of what's coming out of your kitchen. The same goes for menu items advertised as vegetarian or vegan. It is not kosher to substitute pork for veal, bacon for tofu, or beef broth for mushroom stock. To do so betrays the confidence your customers have in your word, your menu, your credibility.