So basically we spend more energy on preventing juvenile misuses of technology than realizing it's full potential? People can also just Photoshop someone's head onto an approximately matching naked body and probably be satisfied, thinking with the other head is not very sophisticated. Important part, it's not that person, it's your own imagination. If you indulge in it in private so be it, if you post it publicly, there can be consequences for disrespect. In a way it's better that someone who may have unwisely allowed real pornographic images of themselves to be taken has plausible deniability.

A lot of tech, including digital video was initially about porn because its consumers don't have super discerning tastes and can tolerate early glitches. A more important question is where more mature human beings take it from there. If someone is seriously disabled, having a lifelike VR avatar would be quite liberating. How long are we going to delay such assistive technologies for the sake of our squeamishness?