its a shame about the Ohio incident, that was a terrible day for anyone who is involved with "animal rescue". Great points in the article reply's about elephant sanctuaries.
in my experience exotic pet rescues are essential places to help deal with the overflow in the exotic pet trade.
in fact I run a small exotic rescue and I can attest to the terrible difficulties faced by these people who try to do their best and sometimes find themselves attacked by zoning commissions and ignorant people who simply fear the animals they house.
Its a labor of love and I hope one day all modern zoos learn to support the private individuals that donate their time and money helping animals zoos and governments have failed to recognize as important to the overall mission of conservation and education.
The everglades may be the best modern example of the problems that occur when private owners have no where else to turn and simply release animals into the wild, Thank heavens for Miami zoo's exotic pet amnesty day. Its simple to coordinate the responsible housing of exotic species, as long as people have a place to go they wont commit the horrible act of releasing an exotic species into the wild.