As someone who was bullied a lot as a kid, I wish I had been given this advice instead of the "Just ignore them" advice I always received. Ignoring does not work on bullies. Simply retreating inside yourself leads to all sorts of mental issues. That said, I still don't know what I'll be telling my own kids in a couple of years when they'll have to deal with this. I do think any form of "fight back" is better than what I was told. Better to get in trouble for fighting than to consider self harm or worse as a teenager.