The laws regarding a lot of this stuff seem to ignore that people under 18 can and will be sexual.
If we allow people to use this tech for adults (which we really shouldn't), then we have to accept that people will use the same tech on minors. It isn't even necessarily pedophilia on all cases (such as when the person making them is also a minor)*, but it's still something that very obviously shouldn't be happening.
* we don't need to get into semantics. I'm just saying it's not abnormal (the way pedophilia is) for a 15-year old to be attracted to another 15-year old in a sexual way.
Without checks in place, this technology will INEVITABLY be used to undress children. If the images are stored anywhere, then these companies will be storing/possessing child pornography.
The only way I can see to counteract this would be to invade the privacy of users (and victims) to the point where nobody using them """legitimately""" would want to use it...or to just ban them outright.