>>34296This. I'm sure lots of people here started using imageboards when they were underage. But a lot of communities teens/young adults use fetishize victimhood and being vulnerable, so you get social status from announcing that you're a minor. That kind of behavior is looked down on in imageboard communities but someone who grew up without using imageboards, after lurk-before-posting culture died would have no way of knowing that.
I don't think keeping her here is unethical, I was using imageboards too as a teen. Only concern is that it could be a legal liability for the site, but it's probably fine as long as she doesn't admit it on the site itself.
It's a very fun thread so I'm glad it will stay at least.