Putting this in general, as I believe NCAA/NHFS/other codes treat would treat this the same.
Pylons. Watched a play this weekend while working chains on Saturday where it looked like the defender intentionally kicked over the pylon as the runner was approaching, knowing that it was going to be a close play to the sideline/goal line/pylon. Knowing that the pylon is out of bounds, but also part of the end zone, and that it is a tool (best word I can think of) for helping us determine in or out of bounds, TD or no TD, is this just a small advantage B picks up, or do we assume that the pylon is still there, and make a judgement call as to whether or not he would have touched the pylon, had it actually been there (phantom pylon)?