Height restrictions!

I was in a shopping centre yesterday and was walking past one of those machines that measures your height and weight and gives you a printout as to how overweight/underweight you are. Next to the machine was a sign that read:

"Find out your ideal height!"

Now, unless you possess some kind of medieval torture equipment, I would have thought that changing your height was stretching the realms of anatomy (if you'll pardon the pun).