I don't think you got what I was saying. I didn't say "Treat it and release it", I said "don't release it." - Panacur won't kill everything. The commercial treatments most pet owners can get won't kill off some of the more exotic stuff.

There was an incident with a native bird being rehabilitated with non-natives, and catching malaria here in Oklahoma. The bird was released, and because of that there's a high chance that malaria was introduced to the state. This is a disease which can, and does, effect humans as well. There is "Fish tuberculosis" which can jump to humans, and is not easily treated. Any aquatic animals can carry "Fish TB", from what I understand.

It's a moral and ethical issue, that's what I was getting at. And depending upon your local laws, it can be a legal issue as well.