As most of you could probably surmise, this device has absolutely no intelligence to actually distinguish between Fox News and any other channel. Rather, when you order it, you have to tell the supplier which channel Fox is on in your cable system, and they send you the proper filter for that channel. So if you chose, you could order the same device from them to block just about any channel you wish. (Assuming of course you find that sensible, and that you couldn’t just skip it with your remote control or even your cable box’s parental controls.)