We Canadians are tolerant people. We'll grudgingly put up with long lineups, discourteous drivers and other invasions of our personal space and patience. But don't you mess with our lawns and gardens. Tom Harrington reveals the story of how, for many unwilling clients, Canada's largest lawn care company has become a more invasive pest than the ones they promise to get rid of. What do you do with a lawn care outfit that won't take no for an answer? Marketplace exposes their over the top tactics, and we speak with an insider who worked for the company.