To the list of problems plaguing President Obama's health care law, add one more — fraud. With millions of Americans frustrated and bewildered by the trouble-prone federal website for health insurance, con men and unscrupulous marketers are seizing their chance. State and federal authorities report a rising number of consumer complaints, ranging from deceptive sales practices to identity theft, linked to the Affordable Care Act. Madeleine Mirzayans was fooled when a man posing as a government official knocked on her door. Barbara Miller and Maevis Ethan were pitched by telemarketers who claimed to work for Medicaid.