fun fact, that would make the transmission slower.
According to wikipedia cat5 cable has a propagation delay of 5.30 ns/m, which works out to about 62% of the speed of light.
While radio waves propagate at the speed of light.
"We have seen that you can embed viruses into cartridges, through the cartridge go to the printer, from the printer go to the network, so it can create many more problems for customers."
If the cartidges didn't have drm chips you wouldn't have anything to load with malware to begin with.