The data can be used for traffic analysis (number->number call data); "no PII" except it's pretty easy to match a number to a likely user. I'm an AT&T customer

The data can be used for traffic analysis (number->number call data); "no PII" except it's pretty easy to match a number to a likely user. I'm an AT&T customer, and in my case I don't have a risk, but I can imagine this info could be very handy for divorce, custody, and corporate IP lawsuits. So worse than it might look to ordinary folks.