A family-run towing company used fraudulent lawsuits to build a lucrative stream of income. The victims were working class people who kept telling the commissioner that the suits were bogus. Eventually, the scammer sued an insurance company and a young lawyer, Greg Adler, stepped in, smelled fraud, and spent 1,200 of his own hours to bring the scheme to a halt -- and send the scammers to jail. Stories here and here.