Tough to code, but perhaps drone loss due to flying a bomber like a fighter should count 2x deaths. For those who care about score, they might learn to fly bombers properly - for those who don't care, you can't make them care and they'll just do whatever they want anyway.
It sounds like this wish is all about bomber missions and the desire for the mission leader to arrive at the target with an intact force by asking the game designers to spend precious staffing resources to change the game mechanics for no real gameplay benefit. When you expect and rely upon the general population to perform to your standards, you set yourself up for disappointment and failure. It's a game, some people play it as such and some people play it like it is for real. Not everybody wants to learn "proper" techniques, and forcing them to with artificial rules built into the code is a bad idea.
For me, if I were to set up a mission, the objective would be for everyone to have fun - green guys and red guys alike. As long as people have fun, I would consider it a success.