What are the jokes that teenagers are addicted to?

■ On July 30th, 2005, Xiao Tao, a 6-year-old boy addicted to online games in Beijing, threatened to kill his father after demanding money. That night, the father found a kitchen knife on the table in his son's room. The desperate father killed his son with a dumbbell on the ground.

■ On February 27th, 2004, Zhang Xiaoyi, a 3-year-old boy from Tanggu District, Tianjin, committed suicide by jumping off a building because he was addicted to playing World of Warcraft online.

■ On July 7th, 2005, an Internet addiction teenager 15 years old stabbed his mother to death with a rope.

■ On March 22nd, 2006, at about 1 1, Xu, a young man from Wuwei City, Gansu Province, scolded his parents for surfing the Internet and killed them. Then he took the cash from his father, 27 yuan, and went back to the Internet cafe.