Junk faxes

At my office I have two phone lines. Some idiot keeps sending me faxes on the second line, even though I don't have a fax online at all (nor do I have a published fax number). It's because of idiots like that, by the way.

In the week and a half I've been in here, I've gotten about ten or more messages on voicemail that turned out to be fax tones. If I identify the culprit, they will be at risk of injury.