What should you do when another exhibitor "invades your space" at a craft show? Well, my advice would be to politely, but firmly ask the offending party to remove their display (or themselves) from your booth. You have paid money just like everyone else to display at the show. When someone puts part of their display inside your allocated space, they are in essence stealing money from you. However, keep in mind that some people are just a little absent-minded and may not have even noticed they were inside your space. In that case, politely pointing out that fact will take care of the problem easily.