Nah the devs are definitely cheating in order to test things faster. The Konami code. Probably the most known cheat of all time, was a dev code tor testing originally.
Cheating in fps games [i]is[/i] normal right now.
It's a really serious problem industry wide, NOBODY is dealing with it well right now.
Current anti cheat hasn't met with the developments in cheating software and hardware.
It's not a good thing, and it shouldn't be normalized, but destiny is not an outlier here.