The Internet Spam Control Center (http://drsvcs.com/ nospam/) and No Junk E-Mail (http://www.directnet. com/ spiegel/) claim to help stop unwanted e-mail, as can the Direct Electronic Mail Marketing Association (http://www.memo.net/ demma/dema.html), which also allows you opt in to mailing schemes.
Netizens Against Gratuitous Spamming (http://axxis.com/ian/nags/index.html) includes case studies of spams. For revenge try http://mnnt1.hep.umn.edu/junk/.
To see just how much information commercial sites can gather about you visit the Center For Democracy & Technology Web site (http://www.13x. com/cgi-bin/cdt/snoop.pl).
The Electronic Privacy Information Center (http://www.epic.org) shows how to make your communications more privaten