It'll take a concerted effort by at least one club to tackle every player in front of the ball carrier!
Hit them, hit them hard as they won't be expecting it!
They'll moan, they'll groan that they've been tackled off the ball etc.
Captain has to be primed, by coaches, to tell ref that they will continue to tackle any players ahead of the ball carrier....!
Ref will threaten yellow cards, penalties etc, but the team should continue.
Pre season "friendlies" would be a good place to practice!!
Actually, even better, tell the ref in the pre match coaches meeting what the team has been told to do....see what they do!