A group called Ecojustice has called for an investigation into global warming dissenters, under Canada's Competition Act. Their case, if you can credit it, is that the act forbids anyone from making misleading statements when selling stuff or for promoting their business interests.
Interestingly, the groups targeted are Friends of Science, the International Climate Science Coalition, and the Heartland Institute. Given that none of these are businesses, the investigation promises to be rather short.
Interestingly, one of those involved is Danny Harvey, an academic from the University of Toronto. He gets a mention in the Climategate emails, where he was involved in Hockey Team efforts to dish out retribution after the publication of the Soon and Baliunas paper (Hockey Stick Illusion p. 406). I understand that he is now an editor at Climatic Change too. I imagine you have to take care about what you submit to that journal.