it was surprising how many tackles of this nature did occur last two years. This was arguably because the NRL were trying to clamp down on it, so if it even looked like a hip drop tackle it was declared one, even if it technically wasn't. Not many this year but I would also imagine players largely have got the message.
In saying that, if a player tries to barge past you, your natural instinct is to pull them down, whether your reaction includes actually thinking about being ok to use body weight, but not accidentally/deliberately landing on the legs, is not always possible.
It does reduce the injuries that occur though which is good