It is not cheating, but it is not the intended way PvP was made. Feeding orbs is one thing, but to have an infinite orb bubble village that can move across the map and tank void bombs is not teamwork in the slightest. If there were any way to overcome this strat, maybe they could afford to leave it in, bu the only way I can think of to derail it is for a striker to somehow make it past 8-12 golden gun shots and hit a perfect fist of havoc on all of the bubbles. However after that all the defenders have to do is pick up a few scattered orbs (there's a huge surplus on the ground) and it's back to it. This is as much teamwork as having the Fireteam leader disconnect during the Crota fight, or having a sunsinger resurrect after thralls despawn. Exploitation of mechanics is not teamwork.