Plus, I imagine the reactions of the teachers will probably be somewhere around *hauls her into the medical wing at least once per week because they're sure she's possessed.*
Take all those reactions of "holy crap, this is unnatural" from the werewolves (who live in the woods and are at least somewhat inclined not to question something if it's helpful) and put that in front of a bunch of people who clearly are the most well-informed about how things work (otherwise they wouldn't be teachers, right?) and this is probably going to be roughly on par with all the looks she suffered before she left England in the first place.
Also, if all her spells default to "horrendously lethal" or "immediately practical" she's not going to be able to fend off bullies (Malfoy, etc) too well when they realize that she's not being allowed to maim them. (Plus, we canonically know that none of the teachers give a $%&# about the bullying issue, so good luck there!)
I'm curious if they'll be physically capable of keeping her in the school if she decides to leave? Sure, if for some brain-blessed reason she went back she'd get yelled at, but as things have been at least so far, they can't keep up with or find her (at least on casual inspection) even though they are already able to detect her magic use at least within Britain.
Probably the school implicitly applies a Contract or tracking charms, though, given how shitty a lot of that is when looked at objectively. Maybe their society wouldn't go that far, but it's basically a patronizing nanny-state when it comes to children or non-magicals. I could fully see someone thinking that was a good idea (heck, the Hogwarts register itself does that!) and adding that as a "feature," never expecting someone with a different type of magic (and even then, see patronizing) or needing to get away from the school (see Voldemort). Which is mostly "reasonable" (even if the idea itself is a bit stupid), but is about to go horribly wrong...