1.1 Multiple Phoenix accounts are not permitted.
There may only be one account per person. Measures are incorporated to detect multiple user accounts. This includes creating an additional Phoenix account when banned or suspended.
Were there multiple accounts in my household? Yes, mine, and my sons. My son played it for a day and reached level 5. I'm not worried about it, but the narcissist in me

The aknowledgement from Uthred recently is the only thing that should cause concern. Their understanding that one account means one pc. So my interpretation is this if i try to follow their rules :
1. One account per person
2. One person = one computer
I hope its really that simple. If so, then yes, there is no room for error.