User blog comment:BurningHype/RWBY/Soul Eater Crossover - FWMA/@comment-8182065-20150619090513/@comment-8182065-20150620073335

Good points, yeah. I just remembered hearing that Kim (the meister girl who was paired with the lantern weapon) was a witch, but she was pretty much kicked out of the community for not being as destructive as the others (her having healing abilities and all) and then enrolled in the school. So, public enemy status sort of fits her perfectly.

Though its a pretty rare case (she's really the only example I know so far),  so I wouldn't expect there to be too many witches/wizards like her running around in the school.