It is against the rules to share passwords accounts. This is cheating. All players can be banned. Hopefully not permanently, and sometimes it's not a ban just violations as each account is taken separately. This includes going onto another's account to train for them. Each player is responsible for their own account, so if that "friend" gets them banned, then they are banned just as if they had said that. We don't return horses, items or money that was taken off of these accounts either. So if they share passwords then basically they are screaming "Someone hack me and take everything I have."
Players who are banned need to use the Contact Us link and contact support if they need to know why or for how long they are banned. Sometimes all they have to do is contact us to get back on, since we banned an account to protect it, or for because we needed to talk to that player about the rules before they can play on the account again.
Bans are rarely actually permanent. Most of the time they are temporary. If not a timed ban it still may not be permanent, we just need the player to contact support. Sometimes players will be given a 1 month ban, or a 2 or 3 month ban then allowed to return. Sometimes they may return but not on that same account = they had to forfeit an account. Most of the time for this type of ban they must promise to follow or comply with certain things. If, they still can't follow the rules and break the agreement, then the ban becomes as permanent as we can make it. It is a game after all, and these for the most part are kids.
That's all I can think of before breakfast. *laughing out loud!*
If you have any questions please ask, and if I think of something else I will add it here. :)