上传资料重复的问题

还是重新开帖,以示慎重!
说说文件上传重复的问题.
资料版是本论坛的重点之一,作用不用赘述!可是经常看到重复发的资料,我给几个连接大家看看:
http://co.163.com/forum/content/224_244734_1.htm
http://co.163.com/forum/content/224_185613_1.htm
http://co.163.com/forum/content/224_160206_1.htm
http://co.163.com/forum/content/224_194498_1.htm
http://co.163.com/forum/content/224_225839_1.htm
http://co.163.com/forum/content/224_147165_1.htm
http://co.163.com/forum/content/224_185303_1.htm
http://co.163.com/forum/content/880_209305_1.htm

光7251就有这么多,可能还不止这些,严重浪费了网易的资源.
如何杜绝这类现象,是个需要考虑的问题.....
要是以前承员租的服务器早就挂了......