said by cablegeek01:Changing your profile or cloning the mac would be quickly detected.
I think it's a bit more than just stealing from a huge corporation. When people hack their cable modem, they often un-cap it and then the modem attempts to download and upload at its maximum capacity.
This overloads the upstream and downstream channels, and impairs everyone's service. If you have a few uncapped modems in a node, it can ruin everyone's internet experience. Especially if said hackers are using bit torrent as well.