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I could see a Outraged anti-porn crusader going to renderotica and pointing out a few of the "not obviously 25+" pictures and claiming they are obscene images of a Virtual 17 year old; as there is no birth certificate, the validity of the charge would be totally and completely up to the judge and/or jury, wouldn't it?

Yep.

We take reasonable steps to insure that nothing in there looks like paedophilia, and that's more than most 3d sites handling pr0n do from the looks of things. After that, well...? If you constantly lived in fear of traffic accidents to the point where you never go anywhere, what kind of life would you have? There comes a point where you just have to look at the outraged crusader types and give 'em a big fat "Fuck You!" when they threaten to impose themselves. Renderotica has managed to do that for roughly 10 years now.

Otherwise they simply dominate you, and you grant them power by giving in. See also the galleries here (where PayPal dictated the TOS, and not the PTB).

It's all up to you.

/P