Steemit is a social network,can enter persons of any age, I remember it was not required from me to check my age, minors can enter here and see post about pornographic, erotic images or of adult content. Maybe the people think that for putting a womens or sexy mens, with few clothes it is going to have many votes, Here is valued the originality, the creativity, the only content, The people that think that a nude is going to generate a reward, can try to put here a pic of his nude, It at least would be original!.
Do you believe that steemit is a place for the porn? If it is like that, should it demand check of age? Personally I think that not, to look for pornography the pages of pornography are and there are many.
It is my opinion, I wait your.
For this type of content maybe it could create. Xsteemit
Regards