Zealous animal rights activists are harassing farmers online and it's reached the point that it's potentially damaging to the farmers' mental health, according to a recent parliamentary report. Andrew Campbell, an Ontario-based grain and dairy farmer who Tweets to almost 22,000 followers using @FreshAirFarmer, says it's a growing problem. Campbell testified before the committee preparing the report, and described being called a "murderer" and much more by online activist trolls. Campbell says he's started dialing back his own online presence after the cyber-harassers began threatening to come to his farm, and he joins John now to discuss the online hate many producers face when they share their work on social media.