I occasionally go to Macdonalds with my grandchildren. I have whatever veggie meal they do and my grandchildren have the fillet of fish or a cheeseburger. I realise it's not an ideal food but I don't think that the occasional "lapse" is going to cause too much harm. Both of them take plenty of exercise and are not overweight.
Having watched what amounts to a PR exercise in the linked video I was pleasantly surprised to see that the fries are actually made from potatoes - I thought they were made from some other starch product. So, from the video it didn't seem too bad.
But then I saw a video entitled something like "If you watch this you'll never eat a Macdonalds again". It was quite enlightening. Apparently Macdonalds only use long thin potatoes - generally Russell Burbank - and they must be absolutely perfect with no little spots caused by aphids. In order to ensure this, they apparently have to use a particularly nasty pesticide. "Corporate" cooking also apparently differs greatly from home cooking in that much higher amounts of salt, fat and sugar are added - which creates what the industry calls "snackability" or "craveability", more acceptable terms than "addictability".
I'm now wondering whether we should eat even the occasional Macdonalds given the environmental and ethical implications. However, I expect these issues are also present with other forms of fast food, such as pizza, fried chicken, etc. I do my best to do the right thing but sometimes "stray".
I agree with absent that children should not run around while eating - for the reasons that she and others have mentioned - and also it's bad manners.
I had to laugh at Anya's reference to Vesta meals. My mum did cook proper food, although her repertoire was somewhat limited. When the Vesta meals came out we thought they were the height of sophistication and tried all the different "exotic" offerings. I suppose it made a change from mince, Sunday roasts, omelette, etc., but I'm sure they were full of all sorts of junk.