Was this on PvE or pvp? Because PvE harms nobody really and I just say it's fun to use. And just like the Titan glitch, they are not in any way manipulating the game externally to make the glitch work.
Now in pvp you shouldn't use it because it's morally wrong and it ruins everyone's fun.
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Saw them use it twice in IB and when I joined their party they admitted to using it whenever their team needed it