1) If cops didn't chase speeders, they could do something else.
2) Still not actually harming anyone. Should you be arrested because you might throw a brick through a window?
3) You're defending a Speeding ticket (Charging him a fine) by saying that goes to defray costs caused by increased pollution. That cost is already factored into the price of the gasoline.
4) No harm, no foul. He didn't hurt anyone, so why are you defending the extortionists in blue?
1) Yes, but cops are put there to enforce the rules. If people followed the rules they would have find other things to do.
2) If you're carrying a brick in a no-brick zone, yes.
3) No, I'm defending charging him a fine because he broke the rules.
4) Because there is no extortionist in blue here. There is a rule enforcer and someone who broke the rules, well aware that there was consequences.