Then if this can be fixed by a server side change as suggested below, that's worrisome, since it suggests it is communicating with FB even if you don't invoke it.

the real question though is if the library is not even imported into the main app and just left hanging around, linked, would it still crash? i'd be curious to know

Apparently yes: https://news.ycombinator.com/item?id=23097887

Correct, as the code is run as the dynamic linker pulls in the library (which is usually at application startup).