One of the links hidden away in the article is actually quite amusing:
http://www.nytimes.com/2012/03/13/opinion/bike-thief.html?_r...
It is a video if a guy stealing a bike a few times with saw/crowbar etc. (Except it's actually a hidden camera setup and it's his bike. Spoiler alert: Many people walk by, noone cares)
The major deterrent in long public illegal operations is not the fear of a bystander taking action, but in the soon-to-be injured party (or a compatriot of such) taking notice.
Someone trying to get into a car could have just accidentally locked his keys in. Someone trying to get into my car has nefarious intent.