One thing that irks me from these threads are people repeatedly saying "I won't sell/trade/whatever loot if the guild leading the run says its not okay in that run." Well, guess what, most people have fairly static loot policies that really aren't subjected to regular change. So let this thread be a fair warning: if you are on Argo and you buy/sell raidloot in a run hosted by one of the guilds below, don't be surprised that you are declined from all of their future runs afterwards.
I'll get it started:
ChaosKnights (do not allow trades either)