I think the biggest problem is useless owners who are too lazy to build adequate fencing!!
If you choose to own a dog like this, YOU MUST ensure that there is no way possible the dog can escape. And if that means 3 metre fencing, then so be it.
I understand how hard it would be to give the dog up, I don't think i could do it (I loooooove dogs). But also the precautions you must take when owning a dog like this sometimes aren't fair for the dog.

Where would you take it if you did give it up?