就是不明白

今天
收到几位朋友的短讯
来来去去就是这两则

短讯1
紧急通知各位朋友: 
刚刚收到的紧急通知：
如果收到《钓鱼岛开战啦》的图片，
请不要打开，立即删除，
现在已经确认，
这是比较极端的日本网络青年，
攻击中国人电脑，
会使电脑丧失一切信息，
请大家复制一下，
发到各自群中，互相通知一下。
已经有人上当了

短讯2
Urgent ! Please inform all.......... 
For your computer and for mine, 
circulate this notice to your friends and family contacts! 
In the coming days be mindful: 
do not open any message that contains 
an attachment called "Update for Windows Live" 
regardless of who you sent. 
It is a virus that burns the whole hard drive. 
This virus comes from a known person 
who has your address list. 
This is why you should send this message to all your contacts. 
If you receive a message with the attachment 
"Windows Live Update", 
even if it is sent by a friend, 
do not open and immediately turn off your computer. 
This is the worst virus announced by CNN,
and has been classified by Microsoft 
as the most destructive virus ever. 
This virus was discovered by McAfee yesterday. 
There is no possibility of repair for this type of virus.
It simply destroys Sector Zero from the hard disk. 
Remember: if you send this information to your contacts, 
you will protect us all!

我不明白
就是不明白
为什么世上会有这样的人
为什么他们要那样做
为什么
为什么
？？？？？？