Everywhere that I have looked, only states the airport name at the end. However, I have always said the exact same thing at uncontrolled fields as you stated! But, nothing states that you cannot say traffic at the end; additionally, you are not required to talk at uncontrolled fields, so who says that adding traffic is bad?! AS mentioned earlier, someone may have just chimed in on the frequency, and would appreciate to know exactly who you are talking to. Ultimately, who gives a darn if you say traffic at the end; next time respond with, "My pep-peeve is people who interrupt my radio calls with non-sense remarks!"