Apropos my previous remarks, the current setup works out just fine for most working models most of the time. There is a brisk little industry of models taking a fee to model for a photographer who will take some pictures of some degree of merit between negative infinity and excellent. The model gets a few hundred bucks, but no rights to the pictures.
Still, in this case, the point is that it hardly matters who has what rights. These pictures aren't going anywhere anyways. Terrible, excellent, it doesn't matter. The market for pictures of models is not a lucrative one, in general. But one has to ask in this case, why not share rights? It doesn't matter, surely.
It gets tricky when you're photographing people who are not working models, and who you may be photographing in something less than a flattering light. You're taking more and giving less. The pictures still are not going anywhere, but the transaction is balanced far more in the photographer's favor here.
There isn't any money in play at all, but pride, self-respect, dignity are.