I have a buddy of mine that is currently working on this site...
nerdpeeps.
Some of the pictures that he has on there are borderline adult (no definitive nudity per se, but it definitely treads into that gray area)...should he put an 2257 Warning Page up anyways? I don't feel like it needs to be front and centre, but at least a page that one can click on, similar to a FTC Disclaimer page.