From Bill Watson, an old friend who teaches at McGill. It seems the Canadian postal service (Canada Post) decided the three steps up to his porch were a hazard to mail carriers. If left unfixed, they would stop delivering his mail. More here, including a picture of the dangerous steps.
What’s not in the piece is that the story was followed up by the news media all over Canada, making him a national celebrity. For months afterwards, UPS and FedEx workers joked when they delivered packages that they were happy to walk up such dangerous steps for such a good customer.