People ask the same thing today. Technically WWJD isn’t a good question here. Until the time for the Cross came up, Jesus was always able to walk peacefully through hostile crowds. Jesus’ final instructions to the disciples before being betrayed were to take a couple of swords, and these weren’t for sabre dances. Jesus knew that they would not always have a hatful of miracles to call on like He did. So what would turning the other cheek and walking the second mile mean? I think it would mean to accommodate demanding people as long as the situation did not become unsustainable, or you would have to sin or leave other valid commitments undone. Pushy people and frank bullies aren’t the same thing.
My reply was a comment to the pompous knuckledragger who called everyone who's been bullied and intimidated a coward. Of course there's a time to stand up for one's self and fight. But to deny the harm that bullies do is ridiculous - especially since they are empowered by the punish-the-victim monsters that call themselves teachers and administrators.
There are seriously screwed up kids out there because these monsters have attacked their very right to self-defense, and left them vulnerable to savage abuse. To not acknowledge the psychological results of that sabotage of the human psyche is to miss the very reason those totalitarians are doing it to the kids in the first place.