The title is incorrect. The patches have been rebased against the 6.13 tree but have not yet been accepted or merged.

I’m not going to respond with a lot of depth because I don’t think I have a good enough understanding here to be particularly helpful, but I suspect a collar would be considered as inappropriate in a school because of its strong association with BDSM practices alongside the general societal expectation that one’s sexuality is kept out of the public eye. I think that notion can also apply more broadly to the situation as a whole, at least to an outside observer.