Working with scams and hacks are a messy business. It becomes a lot worse when person x and person y are "allowed" on the account, but person z hacked it. It's extremely messy.
Because of this, I banned any form of account sharing/trading for the first 4 years of the game.
I was convinced by tricky to allow account sharing, but on the tradeoff that I will refuse to give support to those who participate in this act.
It's almost the equivalent of breaking the rules and not getting support from it, because I do not want players account trading or selling, and those doing so do so on their own risk.