People who eat lots of junk food will take this article as an encouragement to eat more of it.
Less of it, surely?
I still reckon that 1800 calories of junk is better for you than 2800 calories of junk.
People aren't going to change from 2800 calories of fruit, veg, meat and carbs to 1800 calories of junk. I'd hope. Well if they are they'll feel awful and switch back pretty quickly anyway.