How far would you push a picky eater?

I recently read this news story about a teacher who forced a second grader to retrieve a portion of his uneaten lunch out of the school trash can because she was concerned he wasn’t eating enough.

I, too, dread dinners where my picky eater just sits there and claims he doesn’t like anything we’ve served. Some food from his plate inevitably ends up in the trash, though we learned a long time ago to give him very small portions to minimize waste.

Taking food out a trash can would gross me out, too. I wouldn’t be able to eat it unless I was starving. I mean, really starving. I know there are people in the world who live like this. But is it the way to handle a picky eater?