youare, you know I am completely for protecting the interests of the less powerful people in any situation (whether SN, or just a bit vulnerable). But having 3 girls, one with MLD, one going through ASD pathway that is taking forever and a year, and one just being bog standard 'nice' in year 4, I think that the most loving, empowering thing we can go as parents is instill emotional resilience in our children.
Emotional resilience is not putting your fingers in your ears and chanting "sticks and stones may break my bones, but words will never harm me!" It's helping your child to see the dynamics that lead to these situations and how they may, albeit unwittingly, contribute to being treated badly by others, and crucially, how they can change that dynamic.
An example would be DD3. She was upset because friend B got cross because she tried to help her clean friend A's earring, and said she was interfering. DD3 just wanted to be helpful to friend A too. Friend A was blissfully content that her earrings were being washed, while DD3 and friend B were arguing. DD3 couldn't understand why friend B hated her now.
I was explaining to DD3 that friend A has become so important in their eyes, that everyone is fighting to do her jobs, and they're being unkind to each other, to get into A's good books. All she had to do, is to stop playing that game, and treat A normally. Stop picking up her litter, cleaning her earrings, etc. Make her on her level again. It takes some emotional resilience to refuse to be her pixie, but it will work. And it did.
DD2 had a situation with some girls who weren't being real friends. They were tolerating her, then pushing her out, picking her up, dropping her. When she told me she wasn't sure they were actually friends, I agreed with her. We talked and I said "the only way to stop them doing it is to stop letting them". Make the choice. Decide that they don't get to use you. That's emotional resilience. Choose to accept that they've shown you who they are, be nice, it's ok to spend time occasionally, but stop following, stop chasing, don't put them in that position of power.
We need to give our children the tools to take power back, assertively.