See a scam ? Report them to us, OR at these places:

http://www.gptboycott.com/submit.php
http://www.alexa.com/ (leave comments and feedback about a site to help warn others)
http://www.mywot.com (leave comments and alerts so others will see the warnings when they load the site)
https://complaint.ic3.gov/ctf.aspx ( The Internet Crime Complaint Center )
http://www.ripoffreport.com/
http://www.complaintsboard.com/
http://www.interpol.int/public/mail/mail3.asp?id=info (Interpol)
https://odr.bbb.org/odrweb/public/getstarted.aspx?siteID=93
http://www.ftc.gov/ftc/cmplanding.shtm (federal trade commission)
http://www.scamshield.com/ReportScam.asp
http://www.fairtrading.qld.gov.au/make-a-complaint.htm (For Australia)
http://www.recol.ca/ (For Canadians)
http://www.consumercomplaints.in/ (For Indians)
Or report them to their host. To find their host, do a search of the url through a whois search, and it should give you the host with information on how to contact the host: http://www.domaintools.com/