The dog's owner is out for a walk. The dog poops four blocks from home. The owner bags the poop. It's garbage pick-up day and the containers are at curbside. Does he/she place the bagged poop in a nearby container, or carry it all the way home?
According to Minneapolis ordinances, you can’t put “substances or materials of any kind” in a residential garbage can “when the substances or materials were generated at a location other than the residence.”
In St. Paul, ordinances say when a dog poops on someone else’s property, the dog owner has to remove the poop “to a proper receptacle located on property owned or possessed” by the dog owner.
Discussion and various proposed solutions (including stickers to put on garbage cans) at the StarTribune.