I haven't encountered a lot of cheating..but this looks pretty blatant to me. Some well timed lag.
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I've had that happen too a few times during the last IB. Exact same issue. It's someone on the other team manipulating the network. Just report the entire other team for cheating and let Bungie sort it out. Keep collecting and posting the video footage too, even though Bungie is saying you shouldn't. That way Bungie has to do something eventually. If things keep stacking up the way they have been, Bungie could lose many of their players. They say they have a team assigned to "throwing down the Banhammer", that all remains to be seen. Top tier DEDICATED SERVERS might help curve this as well, BUNGIE!