A rule can't be created on the fly in order to punish someone for breaking said rule which until then didn't exist. Cheating is doing something that must be prohibited by [i]clearly defined rules[/i]. Meaning "To violate rules dishonestly" - Miriam Webster And in this case I'm unaware of a rule that states what they did violated a stated rule. Although I'm not claiming there isn't one. In Destiny 1 we could use ammo synths in order to obtain ammo. That ammo could then be used by any weapon which used that ammo type. It wasn't limited only to the equipped weapon. However, as I understand, they picked up heavy ammo and used it to load Wardcliff Coil. Then, without using that weapon, switched to another heavy weapon which was already loaded. Although that may not have been Bungie's intent and therefore a bug, how could they know it was not intended to be possible? Furthermore, in a post below, someone stated that running past enemies is apparently allowed since one can't say that running past enemies was not intended to be possible. If it wasn't meant to be possible then it shouldn't be. Yet it is. And to my knowledge there's no written rule that says you can’t. Meaning it shouldn't be considered cheating. Perhaps this is best summed up by stating the universal rule of rules: That being, If something is not specifically prohibited, then it's allowed.