How do you disconnect a TV cable that runs all along the walls throughout the house?
The co-ax TV cable in the house is considered &quot;low voltage&quot; and shouldn't pose a hazard to people (unless something is seriously wrong with the wiring, like it touching the mains somewhere).
First, I'd ensure that the cables in the house are disconnected from the cable service line. There should be a grounding block on the side of the house where the house's cable lines connect to the service lines. They may look something like:


Disconnect the &quot;house&quot; side cable from the block, and then cut or tear out whatever cable you'd like. After this disconnection, the line should not be energized at all. As GrecMac commented, it is a good idea to use a non-contact voltage detector to ensure that the cables do not carry a dangerous voltage.