The main problem with pure unadultered pigging out is you have no idea of how many calories you're consuming and you're probably getting a shit load of fat which is not what you want on a refeed. When refeeding you should be still be counting calorie and macronutrient intake. You should treat a refeed like a strict diet so you hit your intake goals, but your choice of foods will be much more enjoyable.
Fat free sweets are horrible choices when dieting, but they end up being perfect for refeeds. Breakfast cereals, fat free pastries, fat free ice cream, etc... are all great choices. You should also be getting high GI foods on a refeed day. Insulin release plays a large part in restoring leptin levels so low GI carbs aren't as good for this reason. Stick to low GI carbs while on normal diet days and hit the high GI carbs on refeeds. If you're paranoid about fat gain you can always hit some lower GI foods towards the end of the night, but get as much high GI foods as you can during the day.
You can always eat 1 meal on a refeed day that doesn't fit the perfect refeed meal profile, but keep it to 1. If you want to go out to dinner and put some sour cream and butter on your potato then do it. Just don't eat like that the whole day. I usually don't do this because I get enough enjoyment from the carbs alone, but there are occasions where I go out to dinner with family that I'll indulge myself for one meal.