But it’s just as likely the two ships would encounter each other as such:

This could cause some confusion.

The only way to explain why different star ships always meet each other right side up is to postulate some sort of galactic standard. But this wouldn’t explain all the alien civilizations the Enterprise discovers that also fly at the same angle. This could have made for great story lines where alien races are offended by the upside down approach of the enterprise.

However, it bears mentioning that at least one species is an exception to this phenomenon.

no one can upside down the borg

Because of their simple ship design the Borg cannot be flanked, dropped onto or attacked from behind. The Borg have assimilated all three spatial dimensions into their ship design and they always appear right side up.

Mutants come in many shapes and sizes and therein lies the tragic crux of their condition. Although certain deformities appear more frequently there is no single trait common to all mutants. Instead it is their rejection from human society which gives them a shared identity.

Some mutant philosophers have attempted to turn the tables by arguing, “perhaps it is not us who are freaks but you who would declare us as such that are truly monstrous” which has prompted humans to reply, “why would be freaks for calling you a freak? you just said all of that from a mouth on your stomach.”

However, simply because mutants have been cast out and abandoned by human society does not mean they have abandoned their humanity. In fact, mutant society will regularly ostracize and expel members for not being deformed enough proving bigotry has survived where unwebbed fingers have not.