@Raoul Miller
I live in "Rural" UK, both small town and small village. All my life I have never had a theft, shed door is never locked, door is often open. But we do lock it when we leave usually, why not. Cars often with the keys left inside, or left unlocked.
Never had a problem. Try not to assume that yours is so typical, mine might not be either. But then my point isn't the same as yours.
As for my comment to the article.
The people taking stuff, should have thought twice and really not have taken anything without some kind of owners presence there. Stupid yes, but probably not illegal. They should be shamed for it.
As for the site, they might not be clearly legally responsible, but they should show some responsibility in this matter. It should never have been allowed to pass in the first place.
I hope the police get all the assistance they can from Craigslist, and the ISP of the IP address. Unless the user who posted it, was being clever, it shouldn't be too hard for them to get the details of the person from the ISP. Sadly we probably won't know the outcome of this, as it is with all "enquiries".