I totally agree that it should be an illegal tackle... coz anyone who has played football would know you can easily tackle someone from behind without doing that kind of tackle. Ive made a million tackles from behind and never once tackled like that, all u have to do is wrap up around there mid section somewhere, or thighs, and turn slightly as you grab them and slam them down or you'll atleast trip them up and wont gain many more yards coz you've got a good hold of em... hell, thats easier then trying to grab their neck and destroy their knee's..
And saying that banning this type of tackle would make the sport even more sissy is jsut stupid. The way of tackling i jsut mentioned is more physical then the way roy tackles, the way i jsut said you can slam the guy to the turf with force. Roy's style isnt physical at all, its just awkward and results in injury... there is no downfall by making it an illegal tackle