If two player factions ally and their infocards support that then it's up to them what they do and how they do it in their alliance. All I want is at least one, detailed RP post/thread stating that they are allied, what the goals of the alliance are, what the terms are etc.
At least then they can point to some proof of their ingame dealings here on the forums.
This is good, I guess, but I still disapprove of any non-BD flying the Blood Dragon, whose infocard explicitly states 'no sharing'.
I feel that enough factions share ships with the Bird-of-Prey line and the Borderworlds line... this is similar to real life, as things are shared... up to a point.