By that logic, I have to fire you and Elena and Derek and I have to expel Isaac, Malia, and Scott, and might as well kick my daughter out too since she's just come back from the dead. I'll get rid of Stiles, since he's died twice and been possessed by a nogitsune. Oh, Kira has to go too, probably.
I'm sure there's others who will have to go because they might not be straight up vanilla human.