Well attackers spawn right above that area so if you were a defender and someone was hitting you it could be they were standing up top? So they could get the angle to you over the forcefield?
WE were the attackers, THEY were the defenders. In the example I provided earlier, they were all dead and had respawned on the other side of the force fields but were still able to shoot us at the controls and prevent us from dropping the shields, but we couldn't target them to CC or kill them to stop it, and it ended up costing us the match.
It was already explained that this is in fact an exploit of a known bug, and is therefore reportable as a TOS violation.
(Allison: Feel free to correct me if I'm off-base here.)