Yep, I had a bully in elementary school and my mom tried to work with the system of teachers, principal, admin, etc. for months, and nothing at all was ever done about it.

Finally when the bullying escalated to physical levels and started to impact my personality outside of school, my parents basically told me that while I might still get in trouble at school, they wouldn't be upset with me at home if I did decide to stand up to the kid. They stressed to me the fine line between standing up for yourself and becoming a bully yourself, and sent me on my way.

A few days later, my bully found me at lunch and started messing with me. Pushing over my stack of booking, taking some food off my tray...I didn't do anything until he tried to push me out of my seat then it was kind of blurry, but basically I just took a swing at him and knocked him back out of his seat and he hit his head against the wall and started crying.

I did get in some trouble at school but nothing too bad (especially once Mom was called in and she explained how if they tried to suspend me, she'd put them on blast for how they'd ignored the situation for so long), and that kid was nice as pie to me for the rest of our schooling.