If you don't have Shared XP, sharing should only be within your shore party. With Shared XP, it goes for the other officers too. Even though I did write the code on that myself, I'm not sold on it either and I did it like that mainly because @Grey Roger was insisting. As far as I'm concerned, I'd be OK with absolutely no sharing of fencing until you get the perk and after that sharing only within the shore party. Easy enough to change in Leveling.c, but I don't want to keep changing it back and forth obviously because different people want different things.