Huh. I guess it's possible. I don't recall that. I mean, trauma did come up in those warning debates back then too, but I remember that only for stuff like rape, child abuse and such, but I can easily imagine that others read a different selection of posts, and that there was something like that.

I still think why this was in practical use at all for people (including some zines and story collections with haircut free labels and such iirc) wasn't because of rare (I assume) hair trauma, but as a labeling shorthand for a story/characterization type, and that in any case the infamous haircut warning was far more prevalent as rhetoric device in anti-warning arguments (mockery, slippery slope arguments and such).