The Wiktorion appreciation society as part of their argument states the fact that "the database keeps growing", implying that these 'flipped' modules will take up precious database server space, but anyone capable of logical thought must agree that making all 'flipped' modules private will only add to the problem (if one actually exists). If two users create a 'flipped' module and both are made private, that makes at least one module in the database which is a duplicate, whereas if one user creates a 'flipped' module and allows all other users to use it, then there's no need for anyone else to do so and duplicates can be avoided.
As I argued previously, there are certain modules that lend themselves to being installed either way up, and others that are actually designed that way; we should not make a generalised decision about this.
What do you think, solitud?