In any game there is farming so if in destiny sitting in a single spot shooting enemies is an exploit, then playing call of duty camping in a house is exploiting, in world of Warcraft , farming raids is an exploit, in borderlands farming the handsome jack and warrior. Stop complaining, in every game there is a method to level up, if bungie wanted to make a massive emersive world, they should be prepared to see maxed out people. It's all luck anyways, RNG loot system, guys..