Watched a series of YouTubes about a guy who made glitter bombs outfitted with cameras. Pretty cool designs. But the jist is that he was working in the SF area and it was usually less than 5 minutes from leaving an unattended package in a car to having the window broken. In most cases, the rear window was broken so the rear seat could be dropped and the trunk space examined for packages.
It's gotten so bad some residents leave the trunk open and unlocked to show there is nothing to steal, and hope it gets left alone.
Long video, but interesting for the tech. They guy also assisted in taking down spam call centers in India.