Taking Home Leftovers on Shabbat
Question
I always thought you cannot do things to prepare for after Shabbat. And you cannot carry anything within an eruv that you plan to use solely after Shabbat. But I’ve faced a common scenario where I go over someone’s house for a Shabbat meal and they offer me leftovers and other food to take home that realistically there is zero chance I will eat during Shabbat. They get offended if I say no. When I explain the laws of the eruv, which are printed explicitly in the eruv guidebook everyone has, they act like it doesn’t apply in this situation. Many people get upset that I act like a know-it-all when all I am trying to do is follow Jewish law. Even some rabbis I go over sometimes offer me food to take home. This appears to be widespread practice in our community as many view the eruv as a free-for-all. What should I do about this?