Gotta make the individual pieces small enough to mostly burn up completely on rentry.

Term of art for this is "design for demise", i.e. make everything of pieces small enough and materials ablative enough that there's less than 1 in 10k chance that any debris will survive to the surface.

https://www.esa.int/Enabling_Support/Space_Engineering_Techn...

Planned obsolescence but in a good way.

Already exists, Chasm City by Alastair Reynolds. They absolutely trash orbit by planning very badly and over-packing habitats.