Most people would think that laws encourage people to obey the law but that is not always true.  Sometimes, laws unintentionally encourage people to break the law.  A good example of this is speed limits that are set for political reasons rather than being set for the conditions of the road.
    In Northern Virginia where I live, a new four-lane highway was constructed a few years ago.  Everyone was pleased that it would help relieve some of the horrid traffic jams we always have in this area.  Unfortunately, for political reasons, the speed limit on this new highway was set to 50 mph.  This causes two problems.  One is that this new highway now gets backed up as much as the other routes do.  The other, is that most people ignore the speed limit.  And this is true of many other roads in other parts of the country, especially when the official speed limit is simply too slow.
    Once many people start ignoring the speed limit and, in a small way, break the law, it becomes easier to break the law in other ways.  Before you know it, your running red lights (a major problem in this area), cheating on your tax return, hiring illegal aliens to do work for you, etc.  And, as more and more people do this, others become encouraged to also until almost nobody obeys the law all of the time.
Laws are needed, but they need to be realistic and not so many of them that people just give up trying to obey them all.