I had my alt afking at a public iron farm for about 2 hours, then it said kicked for idling to long. It is a gold supporter on utopia. Can an admin please tell me the whole story? Edit: account name AdinDoesGaming
There is an anti-afk system. If you don't move for a while, the system will kick you. I recommend checking in every few minutes to move a little or you can just put something over the w key and run into a wall for a while.
Moving or doing anything else while away isn't allowed, but I agree that you should move every once in a while.
If AFK coasters aren't illegal—I remember a big thing about this back when I was a moderator—then walking into a wall shouldn't be illegal, either. Especially since walking into a wall poses a much greater personal risk.