Good question. If we need a surge protector for our smokers(electronics I suspect), then we'd need them for every piece of electronics in our houses. I only use them for my computers and sound system(more plugs than outlets). TV's, fridges, ovens, radios, coffee makers, heating, air conditioning, microwave, etc. are just plugged into the electric system.
I would think if they are necessary, Cookshack would advise us to use one.