I agree with many of the comments. The JWs only use such incidents to further their cause, e.g. for field service; "isn't terrible what has happened in SE Asia this week. Have you ever wondered how the earth could be if God's Kingdom was in charge?"
On the other hand, such incidents do present a problem for many sincere JWs. My wife is still strong in the truth. She, however, has been reduced to floods of tears watching the TV coverage showing dead bodies, including those of small children being. Yet, she still believes that God will destroy a whole world of mankind at Armageddon. I am sure that she is not the only one affected this way.
Eyeslice