Not sure I agree that a printer does not need more protection. They have plenty of circuitry also.
Also, if the nature of a surge is extreme enough, many UPSes will shutdown immediately. Fair warning!
One thing we ran into this season was someone plugged their space heater into a UPS. It started smoking. lol
I replaced it of course.
I agree with the knot theory. It may work, so why not do it? Just keep the knots loose.
I'm not a broker, paid promoter, or officer of any company. Nor am I responsible for you listening to my awesome opinions. :-p ASK and ye shall receive!