A simple solution perhaps would be for NBCC to put decent locks on all doors or windows perhaps the thieves know that the locks are rubbish and that is why the like to try their luck.It can happen anywhere but I would not be happy even in my own home if the lock was weak so I definately would not be happy with it in a strange place.
A lot of people are mentioning the wooden pole/stick sounds like if that is long enough and inserted correctly there should be no issues.
Just out of curiosity could anyone post a picture of what they mean by taking their own doors/window locks as I do not think I have ever seen the type that a lot of boardies discuss which they can take anywhere in the world with them.
I am thinking how do they attach?