In 2011 Eaton called Canada's national symbol, the beaver, a "dentally defective rat", and suggested that the polar bear should replace it in Canadian iconography. She gained further notoriety in 2012 by leading the Conservative government's charge in the Senate against environmental charities, making unsubstantiated accusations that the charities are involved in "influence peddling" and "political manipulation". On October 3, 2014, the day that Canada's involvement in a military mission against ISIS was announced, she tweeted, "The apple does not fall far from the tree. PM Trudeau refused to fight the Nazis in WWII, Stayed home comfortably in Outremont."
On August 26, 2016, Eaton ignited a controversy online when she tweeted that "Bicycles are a luxury, most of us use public transportation or walk. Never seen a bike rider obey traffic laws. They are special." This was in response to the addition of dedicated bike lanes to Bloor Street in downtown Toronto. She later deleted her Twitter account.