Pass this around to your friends and consider printing it out for your friends who don't have computers as these scams are done via regular postal services as well.
FakeChecks.org ... About Fakechecks.org:
This Web site was created by the National Consumers League (NCL), the nation's oldest nonprofit consumer organization, as a central source of information and advice about fake check scams. NCL created the site in collaboration with the Alliance for Consumer Fraud Awareness, a coalition of consumer and business organizations, government agencies, and companies that are committed to fighting fake check scams.
I get bombarded with these scams in my inbox. I know it is tempting to comply, but it is a slippery slope.