They aren't. Some states have made them illegal to own, so that may be the reason you think this. Currently the ferret is the #3 most popular pet in America behind dogs and cats. If you took a look online and visited your local ferret shelter you would see that they are indeed over-populated.
No. After successful captive breeding programs, they have increased in the wild to nearly 3000.
Ferrets are only bred with other ferrets
The collective term for a group of ferrets is a "a business of ferrets" or "a cast of ferrets".
Panda ferrets the same as other ferrets, just the coloring is different.
Ferrets do have a ribcage
Ferrets do not hibernate.
The plural for ferret is ferrets but a group of ferrets is called a "business" of ferrets.
Wild ferrets - European polecat ferrets live in Europe. Black Footed ferrets live in North America.
You are able to have ferrets in Iowa, there are only a few places that they are banned which are PARTS of New York City, and In California which are trying to be overturned.
Black-footed ferrets are an endangered species. Domestic ferrets are not.
Ferrets are not dangerous at all
Ferrets are terrestrial