This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
Everything you post has potential to remain forever even if it’s not monetized directly. Cautioning people about it makes sense now and has always made sense.
I know a lot of people still have terrible fanfiction they wrote as teens on the internet somewhere, so the warning is very appropriate.