Wow, that's an eye opener - thanks for the link.
I had my bike taken from my own back yard between 3pm and 6pm the other Sunday, thankfully my lock (it wasn't locked TO anything, just to the frame/backwheel) saved the day I think, as I found it across the street and just around the corner. They ripped off my tools and kit, and my saddle but left the saddle bag (who does that?!)..
Scares me reading this about the posts now.. I use one for 20 mins on my commute in
Edit: lock is an Onguard standard Ulock, worth every darn penny!