Thanks for the TED link.

I had a conventional education (the concept of homeschooling doesn't exist in my part of Europe) but from middle school up to university you choose who you interact with and I (small-mindedly) chose to only interact with the "smart kids" who liked math and science. Classes were also grouped by personality type and interests so that mathy kids don't sit in the same math class as the kids who detest math. I don't think I remember a single occurrence where kids socially punished each other for regular mistakes. For foot-in-mouth moments? Sure. For regular mistakes? Nope. To be fair, maybe I was just oblivious and didn't pick up on it.