haven't heard that one before:
http://www.smh.com.au/nsw/harleyjacking-is-brazen-bike-theft-a-first-for-sydney-20111114-1nf03.html
Yes ive heard a few similar stories over the years, so it does happen, just not a common thing.
saw this on a show once, think it was Gangs of Oz. Real cunts act