Some of us don't have the option or want to take the risk of improperly refrigerated food. Many times while towing the inside of the trailer is 100 degrees and its 110 or more outside. We MUST run the fridge on propane and I don't see a problem with that. All it takes is for your potato salad or whatever to be at ~50 for a few hours and you could be sorry.
At this very moment Im recovering from food poisoning and I wouldn't wish anyones bottom end to go through that either at home or on a trip (that would really suck).