I was in the LW (orange I think)arena the other night, and we had taken A4 I believe about 10 minutes prior. There were some enemy GVs about outside the field area, from before the field was taken, so a good bit of the auto acks were shooting horizontal in various directions.
I went to take off, and passed through one of the auto acks and BLAM got nailed about 5 times...
I thought maybe it was a vulcher that I didn't see, so I upped in an M16 and went out to cross the stream of a gun that was just shooting horizontally across the field.
BAM, killed.
I don't know if this is actually a bug or intended behavior. I do have a film of it if needed.