When it came to Destiny 2: The Witch Queen there was an exploit in the Shattered Throne dungeon's notorious AFK farm "The Thrallway" which gave out outrageous amounts of XP, Glimmer, and engrams ...
This comment was made in response to some fan-made Destiny 2 armour that's based on the aesthetic ... alongside the introduction of an AFK timer, seems to have alleviated the issue significantly.