Miss Manners: People bring wine and food to my dinner parties despite my clear memo 

Dear Miss Manners: I am retired and have millions of dollars. Trust me.

We tell people who are coming for dinner: DO NOT BRING ANYTHING. In fact, I have a memo that makes it incredibly clear that this is exactly what we mean. But some a-holes bring something anyway. The response from me is very unpleasant, and then my husband gets all uncomfortable.