This paper was mentioned, it’s free to download.
A thought crossed my mind just now while reading a vegan blog: we criticise fast food culture out of privilege. When I was forced to eat dairy in spite of my lactose intolerance (I did not know I had), growing up as vegetarian (:. fed LOTS of dairy), I’d throw away my lunch or rather give it to a stray dog and bought chips or dholl puri, the only thing I could afford with a coin when I was given any pocket money was that, Mauritian fast food (incidentally vegan). Other days I’d starve just because I felt grossed out by what I was given for lunch. Even that was probably better than dairy.