This has to be made up, surely... http://www.mirror.co.uk/news/uk-news/ferret-attacks-grandma-on-mobility-scooter-1423595 I've only just stopped laughing. Gold quotes such as: "Florence Taylor, 86, was on her way to the shops when the animal hopped aboard. It was like something out of an horror film. It needs catching before it attacks again."
They're the modern day leech. You're happily minding your own business, trundling along down the street on your little scooter, when all of a sudden, you feel something furry around your ankle. No, it's not Don Goodman, but a savage, out of control polecat, and before you know it, it's got half your cankle in between it's saliva ridden fangs. As I say, modern day leech - ol'Flo had chubby ankles, and the small amount of blood let will do her no end of good.
How do we know it's a "rogue" ferret? It could have been acting as part of a gang, a "cell" if you will. It sounds like a pretty well co-ordinated attack to me. Are we expected to believe that a single, rogue ferret could pull off such an attack? People never take this kind of a threat seriously until it's too late.