Not the best argument unplugged.
Firstly you are comparing criminal offences with a traffic offence.
Secondly if we do accept your argument at what point do we decide the club has a right to intervene.
Swearing in public? Should the club get involved?
Mowing the law very early in the morning or late at night? Should the club get involved?
Downloading torrents, which is theft..a serious crime. Should the club get involved?
You see this is the problem. It's too subjective.
The club should deal with its duty and leave policing to the police.
Traffic offence is a very light way of putting it.
My point was that drugs and fighting can be lethal, none moreso than drink driving. Drink driving is like playing Russian Roulette with not only yourself but every other unsuspecting road user.
Using torrents, etc. whilst illegal and a "serious criminal offence" are hardly going to kill anyone.