The umpires seem to have reduced their leniency recently to players defending the mark inside the '9' metre goal square imaginary line where previously they gave them quite a bit of latitude to overrun the 9 when there was a mark within before they retreated. Is it time to adjust the field markings to add a line at the '9' across the whole ground and make this a 'no go zone' for the attacking team unless the ball is in play?