I don’t think anyone reasonable will fault you in this situation. Newgrounds does make it clear that you shouldn’t be uploading NSFW art if you are under 18. If anything that level of accountability you’re showing we’d rather see than denying you’re doing anything wrong.
If people are giving you shit then something is wrong with them.
phenorax
Good decision, although you could just quit NSFW AND fiddle with the filters so only Everyone and Teen art are present but you know yourself best.