I see your point, Snubby, but I think a ditch shouldn't be a kill in either friendly or enemy territory.
Ditching can really take some work sometimes. Heck, a lot of the time. You might have oil all over your cockpit and maybe even a dead engine. You have to time everything just right to find a place to ditch and still have some momentum in the plane left to maneuver and find a safe spot to land, IF you can find a safe spot to land.
If you're in enemy territory, that might make it even harder, as you might have a better chance of enemy still after you.
I think a lot of people underrate ditching. It takes skill and a lot of luck.
I say if you ditch, you deserve to cheat the con out of his kill. After all, he can always try and shoot you down while you're trying to ditch.