It wasn’t so long ago that if you were walking down the street, or eating in public in Paris, you might get tsk-tsk’d. When I first started visiting Paris, I remember disapproving stares if you were standing on the sidewalk, jamming food into your craw. Croissants got a pass, because they were sort of designed to be consumed on-the-go. And honestly, who can expect anyone to be handed a small paper bag with a steaming-hot buttery croissant in it and walk more than ten paces before diving in to it?
(I also remember way back in 1979 when I first visited Europe and went to a supermarket, and after my twenty items was rung up and paid for, I discovered that there were no bags to put purchases in. So I had to gather everything up the best I could in my arms and try to get them all back to the youth hostel.)
A couple of years ago there was an anti-eating campaign on the métro depicting an obviously Italian man eating a fat, presumably pungent sandwich, surrounded by other passengers who weren’t so happy sharing the same car with a man and his lunch. That set off another kind of stink and the ads were pulled down for being pejorative.