What do you think about toddlers being fed McDonalds or KFC?

Considering these foods are excessively high in both salt & fat, while offering little nutritional value, should they come with a health warning about not allowing children, say under 5yrs, to eat it. Especially as the latest studies show that it’s these early years that count the most & that most toddlers that enter primary school are now overweight or obese. http://news.bbc.co.uk/panorama/hi/front_page/newsid_8468000/8468457.stm