I can see the point but it's impractical.
In the end behavior on the soccer pitch is down to the referee and linesmen. Perhaps clubs should try harder to enforce a standard code of conduct and players should behave like gentlemen. For rugby union bad behaviour is rare and there is astonishing respect for referees. Cricket rarely sees bad behaviour. Soccer is a problem and something should be done to curb rudeness on the field.
It's up to parents to show their children what's right and what's wrong and parents should lead by example.