An economic commentator on the Internet who criticized and angered the South Korean government but commanded a huge following was freed from jail after a court acquitted him of charges of using the Web to maliciously spread false information. The arrest of Park Dae-sung in January and his trial on charges of spreading false data in public with a harmful intent -- a crime punishable by as much as five years in prison -- prompted debate about how much freedom of expression should be tolerated in cyberspace in this extensively wired country.