As far as we know, the girls are not victims of criminal acts, only Jaycee is. They have been traumatized, but it is because their world has been turned upside down. There is no reason for the girls to appear anywhere. I think if Jaycee appears on one of these shows, it would be with her mom and sister. I don't think (or at least would hope not) that the two kids would be included.
I don't think there is anything wrong with Jaycee telling her story publicly, its going to come out in the trial anyway, so she may as well make some money from it. I don't think the financial aspect should be ignored btw. Allthough we might be offended by the commercial side of it, the fact remains that both Jaycee and her kids have very limited education and are likely poorly socialized, and that is going to adversely affect their ability to support themselves in the years to come. They are going to have added bills to pay in the form of counciling and supplemental education. The Probyns don't look like they have a ton of cash, so how would all this be paid for? How are the girls going to earn a living? There is not going to be someone taking care of them forever. Our sensibilities should not be a reason to compromise their material future.
I think doing a couple of interviews for large amounts of cash would take care of their financial situation for a very long time. It would have the added benefit of getting the media hunting for information off their backs and allow them to get back to some sort of normal life.
I think the main danger is that they could become corrupted by fame due to their celebrity status. I would hate to see them end up like that Austrian girl who made the mistake of staying in the public eye beyond her time.