I think you see this pretty often out in the middle of nowhere, where people and crime are less common. Considering Walt's remote location at that point, I'm not too terribly bothered by it.
I also thought it was an interesting bit of character exposition. Walt's immediate reaction upon breaking in is to attempt to pop the cap off the ignition switch and try to hot-wire the car. He doesn't even think to look for an easier way to deal with his situation. Just like when he had an easier (and legal) way to help his family in the aftermath of his diagnosis, he decided to turn to crime, instead. He over-complicates things ... mostly due to his ego issues.
It hasn't even been a week, and by all the gods, I do miss that show already!