If there is litter on the ground, people will throw more.
If a car goes onto a previosuly empty bus lane, it will be followed by several more right away.
If enforcement of traffic laws is random and patchy, people will be unhappy to be caught, and won't change their behavior.

In the long run, we're all dead. John Maynard Keynes

The authoritarians transformed "zero tolerance" from an enforcement of existing laws into the implementation of new Draconian laws and regulations.

_{*Lunatic*, n.
One whose delusions are out of fashion.}