I sympathise with Neils´answer.... But it depends on whether the situation is serious or not.
I got angry with my drama queen friend who gave me an elaborate ´poor me´ story about chasing her cat on the morning after the twin towers came down. Most of us were still in shock, but she still put herself 1st.
If it´s a child acting up, ignore is the best, I found.
When it´s an adult, eeh depends on the situation.