Maybe if you were on a mission for the Enclave, with total benefit for them and none for you, they should get at least a bit angry for killing their delivery boy

And, also it's been said on other threads, but it would be really nice to have a system where you could climb your way up in rank with Enclave, making some REALLY boring missions for start. Until this asignments becomes more interesting to the point where you go into the wasteland with some Enclave dudes killing a target (obviously you can't kill another player except he attacks first..)
Then, just then, you would be a soldier fighting for the Enclave and your general, or whoever gives your orders, would care for losing one of his soldiers.
This also could work for NCR, BOS, etc, I guess..
PD: yes, it's a lot easier to think it than do it
