No, I have not seen it. I think there probably are real experiments done with real students. In fact, I remember seeing signs and report of this being used in a U.S. school on Twitter. I guess it could have been made up. I could easily manipulate an image and put a "black's bathroom" and "white's bathroom" sign over the bathroom doors. I remember jumping to the conclusion that this will only create hostility between students.
I remember how it was when I was full of hormones in my immature growing body and also impressionable at the same time. I feel our tribal instincts can easily get exploited. There are various examples when one group is treated differently than the other by an authority, and instead of doing something against the authority, they attack the better treated group. Surely, there is a study like this somewhere where this is well proven and quantified. Yes, it is an unscientific opinion that I say this, so it would be interesting to see evidence that disproves it.
Yeah maybe there is, I am not an expert in the filled so I have no idea, I just know some stuff from random articles and courses I followed online for fun... But I think these kind of things need to be treated by experts also because everyone, even within the same experiment can react in a different way