I have no first-hand knowledge of the process, but criticism includes injuries to the pharynx, esophagus, ingluvies and stomach. The latter may rupture, since the gavage routinely overfills it, with up to two kilogramm of food instead of the usual 200 to 400 g.
This is from Wikipedia: countries in blue outlawed the practice. Red ones practice it. Notably, it is considered culinary cultural heritage in France
Oh no, it’s one of those things where you can use your mind to decide if the butter is going on the pancakes or if the butter is being telekinetically removed.