The only issue here is that the bailer is denying you the chance to shoot him down, nothing more or less. So for the few that do so, and lets face it, it just a gamer that takes that attitude. Is it really necessary to change the way the game is set up? Personally I don't think so, but it did make me think about it.
The alternative is that you will encourage others to fly out of range of a bomber in the hope that the poor sucker who attacks it on it's own will do some critical damage and get shot down, only for the hang about fighter to "steal" the kills. We used to get kill stealling before the way kills got awarded was changed and yet I still see this often, a "dead" fighter floating down minus its tail and everyone below trying to "kill" it.
There are plenty of people who will exploit the weakness's in the game to spoil the game play, so all that can be done is to get the right balance.
Solving one problem and creating a another perhaps bigger one is not the way to do it.
A penalty to the bailer with nothing to attackers is the only way I can think of that does not seem to create another problem. So getting absolutely no points for bailing from undamaged aircraft may help, but it won't stop the spoilers.
