Well I would also want clarification on that, does the "not be able to see them but they can see you rule" apply in dust 2 when they head way off the normal map? (also meaning you can't shoot them)
I ask because its been happening more often now in dust 2 where people go out of sight and only pop out into possible sight / shooting range to pick off someone they spot using the see through walls.
It was my understand that you always had to have a possibility of being seen from the ground when skywalking.