It’s evolved over time. The basis was content which was deemed to “deprave and corrupt those whose minds are open to such immoral influences". The next step was

It’s evolved over time. The basis was content which was deemed to “deprave and corrupt those whose minds are open to such immoral influences". The next step was to remove protection status only for speech which is “patently offensive" and "utterly without redeeming social value". Maybe it’s time for another step. https://en.m.wikipedia.org/wiki/Roth_v._United_States https://en.m.wikipedia.org/wiki/Roth_v._United_States