Must bloggers follow the rules?

Mike Elk was fired as a labor blogger for the Huffington Post because he took part in a labor disruption. The guy who fired him was earning a reported $300,000 a year. Elk was earning . . . nothing. In this posting, Elk cries foul. He says he’s providing a public service. Should a pro-bono blogger be held to the same professional standards and ethics as the rest of us?