Fax spammers are not quite as safe as they might think.
I use the "Spam Vampire" program, http://www.hillscapital.com/antispam/index.htm quite successfully. I`m currently using it against Bernd Meyn. Since his last bit of spam on my fax machine I`ve taken over 25GB from his websites and I don`t think he has yet realized it. This month, his bandwidth bill is going to be huge!
Feel free to email me if you would like to play along too.