Missions happen in space.
Yep, which is why if I go missioning I'll say I'm missioning (unless in character I'm feeling a bit ashamed for missioning instead of shooting amarians, but that's IC lying, not pretending the world is different than it is) and I'll even go so far as to say I'm shooting Angels or rogue drones or whoever the target is, but I won't delve down to talk about specific details about the mission.
As far as the original post is concerned, if I do a mission that involves shooting civilians, or Gallente, or whoever, then my character really did
a mission that involved shooting those people. To prove it, I don't think it's enough to say "you ran a bunch of missions, so you must have run
that specific mission at some stage".
Warp to the mission site, see wreckage, see me warp away? Fair cop. Otherwise, not convinced.