A couple of summers ago I had some tools stolen from my garage. The police officer told me at the time that they had a rash of burglaries where the thieves would drive down the street and look for open garage doors. The thieves would jump out, and grab what was in the open garages before the homeowner knew what happen. He said that I would need to check the pawn shops myself because they had so many that summer. Another time someone stole my bicycle out of my garage while I was working in my back yard.
Now I have everything in my garage under lock and key and I keep the garage door closed when I am outside. It only takes seconds.