Another thought. Make the score penalty the same for bailing out as it is for being shot down. If there is no advantage to bailing, maybe they won't do it.
Players bailing from intact buffs to help their score is a myth.
Because bailing from buffs has no advantage in regards of score. A "bail" is a "death" for score purposes. Your damage/death will decrease, your damage/sortie will be unaffected.
because a bail mean 50% of damage versus 25% of damage for a death so right there is where the stones come in.
You don't need much damage points for a good score, you are hurting yourself more by wrecking your damage/death
And as there is no damage/time score category you don't gain anything from it - you just lose.
A true scoreboy will try do whatever it takes to survive, using altitude, speed, smart routing and his guns in case he is still getting intercepted.
People bailing from intact buffs are
not interested in getting a good score. It's either to deny the enemy any kills, or (I guess most of the time) it's the basegrabbers that are interested in getting the next 42k of ordnance to the enemy base as quick as possible.