[tptacek]

"Warning! Our billing systems have detected that you may have inadvertently removed the SIM card from your power meter and plugged it into your mobile device. Please be aware that Enhanced Roaming Charges may apply to further usage."

[Natsu]

"Warning! Our billing system has detected that your phone bill will be over $10,000, which is two orders of magnitude higher than any previous billing data."

As I already pointed out, this has affected more people than just those who steal SIM cards. And they should have known that an absurd level of charges were being racked up by a single SIM, so it's not like the phone company couldn't tell that it was abnormal.