For what its worth, a good many of those one way flights are because people are using the B-17s as F-17s....meaning they swoop in low, planning on dying, with their only goal being smacking as many bombs on hangars.
Now I know a lot of guys like this sort of action, since they get to jump in the guns and get some kills.
Myself, I prefer to go in with altitude, hit my targets and land safely.
The gunning idea sounds neat but in my experience, most of the buff gunners Ive had go AFK when under attack or just very poor shots.