The Federal Trade Commission (FTC) may not receive many robocalls, but
it gets more than 200,000 complaints about the buggers every month. It
finally decided last fall to issue a challenge to the public to see who
could come up with a way to stop the marketing calls before they reach your ringer. The Robocall Challenge
winners, announced April 2, 2013, were not the most inventive
invectives, but the most likely-to-be-effective technologies
invented separately by software developer Aaron Foss and computer engineer Serdar Danis.