Teaching styles for most are quite known. Bullying can also be viewed quit diffrently in some cases. Was it actually bulling or a staff member being tuff. Is someone bullied or just doesn'tlike to be critized, I've seen both hundreds of times over the years.
Actual bulling or degrading is quite different and the corps management needs to be held accountable for their staff in all aspects. If management is not aware of all staff behaviors then they aren't good at their jobs and responsibilities. If management is the actual bully, then that's another issue.
As I said earlier, an accusation needs to be investigated not just assume, nor follow someone innocent. If all accusations on all subjects went into a data base I think few peoples names would be off that list.