I do appreciate that your content is mild (minus the child porn, even if it's AI generated) but the purpose of grownostr hashtag is going to shift away from my reason for being part of it as long as its going to be sprinkled with naked ladies.
Discussion
To my knowledge, I have not posted anything that is intended to represent anyone under age, AI generated or not.
From the creator of Laura, in case that is what you were referring to:

Maybe I'm getting old, but some of those look much younger than 18 to me
Age is not so easy to gauge. Most people think my wife is in her 20s, and thought she was in her mid teens when we were married. I still have people who think she is my daughter when we go out, and we're both nearly 40.
It still gives me the heebeegeebies to be seeing someone that looks that young
It's an interesting ethical dilemma, in my opinion, and one that has made me squirm more than once, though not in this case, for whatever reason.
There are real women who very definitely appear under age. Not prepubescent, to be sure, but definitely below the age of majority, and yet they most certainly are adults, regardless of how they appear.
I would classify the images I posted as a petite young woman, easily believable as a 19 year old as otherworlderotic.com represented their intent, but also believable as someone a few years younger, had they intended to represent her that age as well.
For artwork that can be interpreted equally believably either way, and is not intended as a depiction of a real life person, the only thing we have to go by is the intent of the artist, or in this case the intent of the prompt writer.
It would be a very different matter if the subject in the photos was not believable as an adult at all.
Other than that, I can appreciate your reasons for not wanting to follow a hashtag if it will have NSFW content sprinkled through it. I think you will find that as Nostr grows, it will be damn near impossible to find a hashtag where that is not the case unless you can filter the posts within it so that it doesn't show anyone and everyone who slaps that tag on their post.
Again, nothing personal. I can see that its not going to work for me and probably many other other people. now that I've called attention to it, there are others wanting to prove some kind of point by intentionally polluting the hashtag with trolling photos and I simply don't have the time in my life to include people that do so intentionally. One can play cat and mouse with blocking, but it's simpler to bow out of the entire concept of hashtags until they fix it. It's a shame because I had hope for its potential.