No, you can’t. Best you can do is blocking communities and users.

You clearly have a lot of faith in humanity if you think parents are always able to feed their kids properly. Heck, a lot of them don’t even eat actually healthy stuff themselves.

A teacher sending a message like this is trying to help, not to “snack shame”, and reactions like this will lead to even more teachers who don’t care anymore and do the bare minimum.

That’s a steep price for being “hurt by snack shaming” (whatever the fuck that even is).