Not an issue with PoE since you're running a cable out to each device rather than linking them in a loop/circuit. But then that highlights the problem with try

Not an issue with PoE since you're running a cable out to each device rather than linking them in a loop/circuit. But then that highlights the problem with trying to PoE and entire house - You have to run a line out from a PoE source to each item you want to deliver power to, and provide a port for each which comes at some cost. I guess you could try and run some kind of PoE passthrough circuit arrangement like you see with some office voip phones... Complicated.