One might make a similar claim for various Earth orbits, especially the geosynchronous orbital ring, since there's lots of old satellites and parts of satellites (and assorted other junk from space missions) floating around up there. In fact, there are some concerns that all that debris might damage important equipment up there.

On the other hand, it could be argued that these orbits are not technically "in the world" at all, in the sense of being on Earth.