I think people who are in favour of fat-shaming as a tool to "encourage" people to lose weight should step back and think about if they would like it done to their children if they were overweight or heading that way.
Think of it. Teachers and fellow classmates with carte blanche to point the finger. Comments by wait staff, in-laws, other parents at parties whilst they eat birthday cake, like everyone else. Well. why not, we need to get these kids to take responsibility and be warned that they are, god forbid, fat or getting fat.
I had a childhood of this, horrible and scarring. I have literally thousands of examples I can give of being shouted at by strangers in cars passing by, teachers and strangers and friend's parents having a dig and commenting, comments by family , discrimination and barring from sports.....so so many.
Did it work? I didn't lose weight until in my late 20's. Not because of fat shaming, mind. Or maybe it was, as I ended up with a superb eating disorder.
Be kind. Let's target the environment, food supply, government policy, education, attitudes but not individuals.