OP here again. I can also understand why UA would have problem with our practice now that I am aware of the "no delegation" rule. By this rule there were red flags all over the place: same address, different names, cross/shared benefit, same PIN, similar email address, same IP/cookie for logging into united.com. As I said, I did not know managing colleagues' accounts for them was against the rule. I did not even try to hide it. My only problem was that there was no inquiry, no warning and no chance to correct the violation. By the MP terms and conditions this is within UA's authority (well, the miles belong to UA not you and me anyway if you read the MP rules.). For me and my colleagues it does not worth the effort for each of us to call and try to get the accounts restored.