It's bad to do things that are illegal.
Joe is running late for work and is considering speeding so as to not be late.
Joe wants to arrive at work.
Joe only goes the maximum limit that he's allowed to on the road to work.
Joe speeds to get to work, going much faster than the posted limits.
Joe arrives 10 minutes late and his boss doesn't seem that upset.
Joe gets a ticket from a police officer and is much later than he would have been.