A few years ago I has a supervisor who loved to "share" food with his team and sometimes he would just help himself without asking. After, dealing with this for a bit my co-workers and I decided to play a trick on him. We took a bag of Normal Jelly Bellys and Harry Potter Bertie Botts Jelly Bellys. The normal jelly beans mixed with ones that taste like earwax and vomit. After that he didn't help himself to our snacks. As fun as that is for Easter I removed the nasty jelly beans and replaced them with sour ones.