Do you agree the 5 meter marking rule introduced in the NAB cup is an absoloute crock of shi te?

The rule in the Nab Cup whereby which a mark has been taken, and if another player from the opposing teams runs 5m within the player who has marked it - there is a fifty metre penalty. Its absolute rubbish, some players might be running to the bench for a much needed break, it could potentially stop rotations and really make it hard for coaches. Its a stupid rule, we dont need it - our game has been going fine without it and I dont see the reason why it has to be introduced because seriously, it just doesnt achieve anything positive.