In general, I've been successful bringing back candies and sundries, but once, when my mom and I were flying back from Tel Aviv, we had food confiscated. My mom, being the practical mom she is, brought some fruit along from home on our trip. We boarded the international flight and snacked on the clementines and apples during our travels. A week later, as we were packing to return home, she brought one lone remaining apple back with us. Once we touched down in the US, she found her bag set aside at the security checkpoint. TSA found the apple and wouldn't allow her to bring it back into the country. With controls like that, I don't know how anyone manages to sneak French cheese and Italian salumi, let alone an American apple!
What are your food travel tales?