Q. Dear Kamo,
The attacking team, usually the backline, has dummy runners moving forward between the ball carriers and the defence. As this manoeuvre must interfere with the defenders' visual line and/or their preferred defensive line, surely its only purpose is obstruction. Why is it allowed?
Ivor Davies, Opotiki
It's important to note from the start, Ivor, that these players running forward but not receiving the ball on every occasion aren't and shouldn't be classified as "dummy runners".
They are genuine "threat runners" who are active within the game and a ball-running option for the playmaker. The players running these attacking lines are an important part of the back attack, which is why they should stay and not be penalised for it.
The objective of the threat runner is to hold, question and pressurise the defence, creating holes and attacking opportunities the ball carriers can run through.
If they weren't allowed, the defence would just drift off the attack and we wouldn't see the open running we enjoy today.