Seriously, why wouldn't you? In the old days you wouldn't because you would be scared that you would get caught.
In the past, “smash and grab” robberies occurred, but it was a very infrequent occurrence. It was rare because thieves understood if they were caught there would be consequences, and even punishment, perish the thought! A criminal would have to raise bail to be released. If not, he would have to spend weeks or even months in the slammer.
Afterwards, there would be a trial or a plea deal, and a criminal might have to go to prison for more months, if not years. Thus, the prospect of incarceration was a serious deterrent, which forced criminals to exhibit some limited self-control.
This is no longer the situation in urban America, everything has changed. At first the change was gradual, with incarceration and punishment being viewed by certain “intellectuals” as a racist tool used to control urban minorities.