pg_dump ignore tablespaces

Recently I ran into an issue where restoring from pg_dump from one machine
to another with non-matching tablespaces. The primary issue is that index
creation will fail if the tablespace does not exist from the dump. I was
thinking to best solution for this would be a pg_dump option such as
--ignore-tablespaces which would not dump any tablespace related data. This
would benefit restoring a dump from one machine to another where there are
different disk or tablespace topologies.
If such a patch were presented and found to be acceptable code wise, would
it be a generally useful enough option to be included?

Gavin