The Globe and Mail reports in its Tuesday edition that Peter Noonan's boycott of U.S. products began on Donald Trump's inauguration day. The Globe's Rob Carrick writes that Mr. Noonan suggests a spending rethink on all things U.S. He says when he goes to Costco he examines "product source labels like never before." He puts products made in America back on the shelf. "Not in my cart. I'm not waiting for the official imposition of Trump's tariffs." At the political level, there is no unanimity on how to deal with the threat of a 25-per-cent tariffs on Canadian exports to the U.S. Yet Mr. Carrick says e-mail traffic after last week's column has been decidedly pro-boycott. "You hit a Canadian nerve with me today," wrote Mauro Fantauzzi of Georgetown, Ont. "We were at the grocery store and I avoided buying any fruits and vegetables from the U.S. Surprisingly it was not that difficult." Paul Butler of Mississauga wrote: "I am not finished yet pushing back on Mr. Trump. Tomorrow I am going to research all the customer relations e-mail contacts of companies such as Celebrity Cruises, Airbnb, Tesla, Netflix, Disney and politely and briefly explain to them why I am no longer their customer, or will not become their customer."