What bad consequences can occur if the username and password from the subscriber's account on the Internet provider's website are stolen?

Question

Information Security

There is a provider that provides access to the Internet and there is a subscriber of the provider.
The subscriber has his own account on the provider's website, where the subscriber can see the status of his account and other information.
Let's say an attacker learned the username and password from the subscriber's account.
What bad consequences can arise for the subscriber?

Answer 1

The owner of the information should be more aware of what threatens unauthorized access to it;) Is not it?
And so, the attacker 272, 274 Art. Criminal Code of the Russian Federation, provider 13.11 Art. Code of Administrative Offenses.

Answer 2

If the cabinet is view-only - well, only the disclosure of information about the costs of tyrnet, as well as personal data - last name, address, phone - everything that is indicated in the questionnaire, IP, if static. If an office with service management - you can cut off the tyrnet;) or vice versa, get the most expensive tariff. This is all, of course, from the category of small dirty tricks, of all this, only the disclosure of personal data would upset me personally.