The orange juice diet is nice in theory, but when you stop and think about it for just a half a second it starts to seem a lot sillier. Orange juice is not exactly bad for you, but it is not all that great for you either, even if it is organic and fresh squeezed. It has a lot of sugar and it is not something you can live off exclusively like beans or rice.
But a lot of diets are based on the idea of ordering your food choices. For some people, having very strictly regimented meals is the only way they can break out of their bad habits. As much as I may think that the diet is silly, if it works for you it works. No denying that.