It has been reported from several sources, and also proven on Twitch and YouTube videos, that some people are ruining everyone's fun in Destiny by cheating.
While this particular indiscretion is nothing really major, it's still possible to have full ammo all the time and shoot rapidly without ever having to reload.
Kotaku has links showing proof of this, and we really hope Bungie will eliminate this problem as soon as possible, so we can go back to the game with every player on an even keel.