You know these little crates and barrels made by modders, which can store all kind of junk? When they are ghosted, you can put the same one as many times as you want in the same place and they will still be functional.
It can become a bit cheaty, but who am I to judge (just don't put 50 of them on the same square). For those who have a ratio of 1 barn for 5 houses, and when space is starting to become the most precious resource, this can be handy. They usually don't contain too much so laborers will not stash on themselves 500 ales and failing to make their delivery to the tavern because the aubergiste can't take that much.
Good hoarding y'all!