.. people will simply order two pizzas instead of one, or order the next size up - and get even more calories than before.

Silly food advice is nothing new. Back in the late '60s, when Ralph Nader was flying high, he published a magazine, which I received for a short time.

Ralph wanted pickles taken off the market by law, because people were wasting money on stuff that had so little nutritional value. He also wanted a ban on yogurt, because "it's too much money to spend for a glass of milk".

Of course, his fanatical followers just ate this stuff up.