I don't care about what the law says, I've got lots of problems with anyone claiming any kinds of rights over a render made with their object, texture map, pose or whatever. As Steveshanks said, in a better world we would ask (and I have been asked, which I thought was very nice), but I never feel less than honored whenever I see a render that uses anthing I've made, either free or what I sell. And if PFO whats to include a boilerplate read-me on their freestuff to the effect of "not for commercial use" (and they are, incidently), that's O.K., because I only go over there once in awhile to see how weird they still are (and they never fail to impress me with their weirdness!), I would never download anything from there.