Yeah for sure, but security through obscurity only works until it's actually important or exploitable for monetary gain. I wouldn't even mind that, but e-mail can do so much better and it's treated like a giant security risk.

I mean, if all the good secret information is going over fax and everyone knows it, sure, people will hack it. Blackhats are in it for the money, not to work with the newest technology. Most of what they do is already mind-numbing grinding.

The main security there is just the security of whatever phone line it's going over. And that's assuming you never dial a wrong number...

Also there is fax spam. I get all these random advertisements faxed to me for companies for window replacement services that don't actually exist, and sometimes fortune tellers. I have no idea why.