Is this feature standard on every OS in use by human kind today? Is this feature requested by most users and not having it pisses off most users? Is this feature available on the system that Wayland aims to replace?
Regarding pissed off users, in my experience most computer users are used to Microsoft Windows and get pissed off when things don't work exactly like that, so unless you work for Microsoft then it's a lost cause trying to please them all.
I don't know of any way an Ethernet device can be truely secured, perhaps it should be disabled until a solution is found. I couldn't care less about a system that is more secure if it massively interfere with day to day usability.