http://consumerist.com/2007/09/14/canadian-telecommunications-giant-bell/

Canadian telecommunications giant Bell Canada is pulling down over 50 ads placed around parts of Toronto and Vancouver, because they show a woman wearing a button that reads “Belsen was a gas,” the title of a Sex Pistols song and a reference to the Nazi concentration camp Bergen-Belsen. The button is one of many the model wears, and the company says it was impossible to read during approval and proofing, and only became legible when blown up to billboard-size proportions. [Reuters and Free Republic]