I'm not excusing the family, but how does AT&T, I mean at&t, allow their billing system to allow customers to rack up a $20,000 dollar bill? The system should have kicked off an automated call or put a block on the account or required an at&t rep to call the customer.
If I was at&t, I would not allow the system to just keep racking up customer's bill without knowing if the customer can pay back the bill.
credit is checked when the account is activated. You're talking about initiating changes to a billing system that probably affects .00001 of their customer base. There's no return to cover the IT costs. The customer has to own responsibility for their usage.