Once you've saddled up on a bogie and shot him up enough to be sure he's going down, do you, if possible, stay back there shooting him 'til he explodes or do you break off and watch him go down?
Personally, I like to see the nme plane spiralling out of control and plummeting to earth. Although, hitting nme until it explodes, while not good on ammo consumption, stops kill stealing and makes sure you don't run into debris.