There is literally the video of the one getting multiple arena chest for the trinket with layering.
Also you don't imagine how far some of the hardcore crowd that played on private server are willing to go when they find something like that to abuse. And they do impact all the server (just look for the devilsaur mafia for example, with the gold they got by doing that, they literally were able to buy world boss by paying guilds to stop any other player from trying to get close, if you were not part of the guild that handled the mafia, it was impossible to get close from any world boss. If they manage to get the same amount of gold with layer abuse, they will lock down entire zone at will by paying pvp guild).