Cheating day or meal?

Many people sacrifice themselves at the gym all week, I say sacrifice because many do not like going to the gym and they are trying to create new habits to obtain weight loss. But I have heard of many saying that today is my "CHEAT DAY" but should we really be having an entire cheat day? I mean think about it, if we decided to eat "bad" all day long, we can certainly eat enough calories to gain the amount of weight that we lose during an entire week of workouts and dieting. Imagine if every 3 hours we eat fried, processed, fattening food? Some restaurants have meals that add up to like 5000 calories (twice as many calories we should be consuming per day), some desserts can have up to 2000 calories. So in my opinion, there should not be such thing as an entire cheat day. I think that if our goal is to lose weight, we should consider eating healthy all day, everyday, and just have a cheat meal.