[qasdfdsaq]

Not referring to faults specifically, but to account related information. You say that mentioning a fault on someone's line is revealing sufficient information about them to break DPA rules, yet sending summaries of people's bills by text message does the same thing and several mobile companies do that. You can also phone up customer services and get automated information about your bill, service level, tariff, and usage without passing any security checks with virtually all telecoms providers, so it most certainly isn't an issue.

Also if you open someone else's emails, you break the law too, and protected information is also frequently sent by email.

So at the end of the day if my bank, phone company, and other ISPs can phone, email, text, or write letters to me proactively when there's a problem with my account, service, or details, clearly this "DPA law" that prevents VM from doing it is either a law that only applies to VM, or more likely gibberish made up by VM.