AITA - Our neighbors leave their double stroller next to our front door.

We assume they don't leave it by their own door because they're on the side of the building with the stairs, and it would be in the way of people going up and down. Where they currently park it is in front of the basement door, but we don't have access to the basement ourselves.

We don't want to create tension with our neighbors, but we also don't leave large, bulky items in the shared hallway.

Are we being unreasonable? Would this bother you, or is it not worth addressing? Any advice on the best way to handle this without ruffling feathers would be greatly appreciated?