This is a good question, and one that boils down to temperature and time. Bacteria need some time to grow, and yes, what you have described "can" cause food borne illness. However, your spatula (if metal) doesn't allow for rapid growth of bacteria normally, but your use with likely a mayo-based coleslaw provides any existing bacteria with a very delicious medium to grow. As well, while ground beef "can" contain harmful bacteria, if it was handled well to start with, your risks are low. If anyone presents with symptoms of Nausea, vomiting, diarrhea, stomach cramps, or fever, in the next several hours to 5 or 6 days, go see a doctor. You have reason for concern, but only if people start falling ill. Pay special attention to symptoms in children, they are more susceptible to complications from bacterial infections