Your Internet Consultant - The FAQs of Life Online
I use a kill file to hide all posts with the subject line of MAKE.MONEY.FAST, thus avoiding a pyramid scheme that won't die and messages from the people it annoys. You might use a kill file to hide the weekly-posted FAQ in a favorite newsgroup or to kill messages from a particularly annoying Usenet poster.
Read the documentation for your newsreader to find out how to use kill files. If you use rn or trn on a UNIX system, read the rn KILL file FAQ that's available on Usenet at news.newusers.questions, by anonymous FTP at rtfm.mit.edu:/pub/usenet/news.newusers.questions/rn_KILL_file_FAQ or by e-mail to rtfm.mit.edu (put send usenet/news.newusers.questions/rn_KILL_file_FAQ in the body of the message).