reminds me of a match I had where a sorc force sped across the first gap as defenders, then pulled a sniper, then stood los healing the sniper in cover as he shot at everyone trying to plant on both doors.
definitely bad form, but an exploit that's probably "Working As Intended" since they haven't patched it.
Not something I would do myself (shooting through the shields). I just dont understand how someone can justify that its fine to do that, I think the phrase "this is what advanced players do" was used. Advanced players should not have to cheat to win a warzone imo, and no matter how you dress it up this is what it is.