There is no harm, but nobody in this media is going to tell you if the girl was witnessed to, and being it's a Christian school I am sure she was. If she advocates on behalf of the two women she lives with, tries to "open the eyes" of others, which I strongly suspect is the case, how can a Christian school permit that???
Too true. However, I wonder how many are willing to really take on this issue. I still don't think we know all of the details, but I have heard Christians treat the sin of homosexuality as if it is the unpardonable sin. It isn't.
If the kid is trying to "enlighten" the rest of the school, then something has to be done. And if parting company is what is needed, then that is what is needed.