Yes, but you can also make it incumbent on the tacklee to keep their feet in the tackle as well. As an umpire, you can build in that awareness to tell the difference, just keep an eye on the legs.Players are content contributing to the appearance of them being thrown to the ground by their opponent because it can win a free kick, you've also seen what Joel Selwood would do to draw high contact at the expensive of his own personal safety.
Blackwood was doing a wonderful job with this last night. Driving into players with her head, choosing to go to ground heavy over trying to stay on her feet, even a nice little dance on the boundary where she created all the momentum to move her around and almost got a free kick for that too.
It's effective, it works, it will win games.