I do remember seeing a letter from the municipality of Yarmouth. It's not our municipality, but it's within the province. They were quite concerned about things like lighting and litter removal, because when most people open their mailbox and get junk mail, it goes in the garbage. If you're picking it up at a centralized location with no waste receptacles, it's going to go on the ground.
The municipalities do have concerns. Canada Post does a pretty good two-step to make them feel that they'll cover the costs, but they're very vague on the details.