"Report: Fake antivirus scams pulling in profits" (ZDNet.co.uk, March 2009)
or cameras for that matter:
"Office Depot Employees Blowing The Whistle On Outright Scams" (TechDirt, 18 March 2009)
The article shows the difficult line between aggressive selling and just fraud. Probably more appropriate to use contract law to deal with the issue.
For another classic fraud, this time applied to the Stock Exchange, and dealt in the US by the SEC: fraud, manipulation of shares...
"Two Texas men settle charges in spam scam case" (Investment.News, 19 March 2009)
For the "Cost of online-banking fraud doubled in 2008" (ZDNet.co.uk, 23 March 2009)