Of course. Bias and prejudice is always a real concern. In situations where the teacher gets it wrong and punishes the bullied kid, the kid learns an unfortunate but useful lesson; that some agents of the system cannot be relied on.
But the zero tolerance response to this circumstance ensures the bullied student is prejudiced against, judging him guilty before considering the facts of the individual circumstance. What does that teach the kid? That the system itself cannot be relied on.
was about to comment the same thing. I teach future teachers, and I always say that_ everyone forgets their school math and chemistry lessons after cramming for the test. What sticks is learning how to survive in an unequal, dysfunctional system where you're the oppressed class, fighting among each other while you can't touch the people in power.
This is how 95% of the world works. In most countries, people are conditioned to "join" the rulers from a very young age, and people who use critical thinking are a tiny minority (often invisible)
I mean that's not entirely wrong either. Bullying was still a thing before zero tolerance policies.
Not to say zero tolerance policies are the right solution, but personal bias _is_ a big problem when it comes to enforcement.