Hmmm, I must confess that I have yet to come across anyone under 21 using Poser or any other 3D modelling/rendering software. It's expensive, and generally requires a slightly more powerful computer than the average user needs for average use. Such computers are also more expensive. Because of this, I doubt very much it's an age-related issue, which is what is implied by "family-friendly": the inference is that there should be nothing on the site that parents might feel uncomfortable that their children will see. (But then there's plenty of torture devices, weapons, guns, zombies, monsters etc... but that's just harmless fantasy so it's OK right?) I think it's definitely more of a moral-based decision at heart, whoever made it. Not that I have a particular gripe about it, but I do wish they'd come clean and just say it: "My religious and/or philosophical/whatever beliefs lead me to feel more comfortable not offering bondage gear for sale on the site" or whatever, rather than hiding behind the inference that children might be upset in some way. If kids wanted to look at naughty stuff, there's plenty of places they would choose rather than a 3D modelling site.