Last summer, when I started working on my program, I was sure that hijackers would someday find a way to exploit broadband and cable as well as dial-up connections and I mentioned this at times on my site. It seems I was proved right by an article on the homesite of The Institute of Electrical and Electronics Engineers(IEEE). As a reference, you can read the abstract at
http://ieee.ca/canrev/cr49/pages19-20.pdf
So, don't hesitate to get protection.