Yours is the first mention I've found of children as members in that community, and its an NSFW-allowed community, so I have no idea where you got that notion.
That said, I would block any minor or minor-welcoming instance I became aware of on Lemmy. I'm not here to interact with that level of immaturity; I still regret not leaving facebook the moment they allowed teens(and grand-parents/boomers - yes it was an all-at-once change).