I've already stated that rules and laws are not generally rational or self consistent. Also, with regard to child pornography, we ARE under McCarthyism now. Read almost any computer or tech news and you will see every day arrests and convictions for using computers in connection with child pornography. Child pornographers are the new bogey man to scare the public into all sorts of restrictive laws and this is one of them. However, while McCarthyism was eventually declared to be A Bad Thing, that did not return the broken lives of the people who ran afoul of it. Many many innocent people were harassed, jailed or worse. If Renderosity makes firm rules known now, the operators will not become one of the broken innocents in the future. While that does lead to a restriction on artistic freedom, that is the price that must be paid on the internet today.