> I also marvel that such a shallow comment could have such an adverse affect on someone.
Some of us are wired differently, and some of us are bullied to death. I'm both. Everyone can't create calluses against these kinds of shallow comments by playfighting, esp. if it turns bullying at life-threatening levels, and nobody intervenes, because they let children to be children.
As a result I grew very asymmetrically from get go. I got very ahead in maturity without the defenses I needed to front and process criticism. I left painting because everything I did was shot down (but I have won two awards for my age groups earlier), I had severe dance phobia for 20+ years because somebody mocked how I dance, and I left writing philosophical pieces because my English teacher mocked me.
Yes, I now dance, and write philosophical things (but not publish them), an old friend who was an art student said I can certainly draw, but I feel no enthusiasm now. The only thing I were unable to get me from me was computers, and I now have a Ph.D. (oh, my math teachers called me a failure, dozens of times, hah!).
So, no, we shouldn't raise people with "emotional battery induced numbness", but shall teach them to deal with harassing people by making them understand the mechanics. It's harder, but it doesn't make you collect these comments in an emotional waste basket and dump on an unsuspecting person who unintentionally triggered you on a bad day. Instead, you process and get rid of them, and it makes you genuinely happy without an overfilled emotional trash compactor inside.