There isn't a day goes by when I don't see multiple examples of illegal driving behaviour on my short commute into work. Today's count:
3 illegal right turns
1 driving the wrong way down a one way street (on the approach to a primary school)
2 stopping in a yellow box and snarling up traffic
1 driving in a bus lane while not being a bus
2 red light breakers
All of these things make the roads more dangerous for everyone and many contribute to congestion. None are enforced.