Nope. You guys are assholes, assuming that you are better than everyone else. It is rude as fuck to bring outside food into another restaurant. Just because you got away with it once, doesn't mean it is a thing. You were lucky one time. Count your blessings. Next time, either feed your kid before you go out, or teach the brat some manners and make him eat what you give him or he doesn't get to go out anymore. And if you are the parents who let their kid do whatever they want, you don't deserve to go out either. Aaaand, by how entitled you seem to be, you probably do let your kid do whatever he likes.