Quote: trys'r'us "I think FA was working from the position that the attacker had already caught the ball and was somehow out of reach of defenders at take-off, but would be within their reach at the point of landing. Obviously it's an edge case, but I'd like to know what FA would want the law to be in that case.'"
No, I said
Quote: trys'r'us "...He can't be tackled whilst diving (he hasn't got the ball); he can't be tackled on catching it (he's off the ground). A defender could only try to place himself in such a way as to prevent a touchdown. There is no way he could legally touch the diving player whilst still in the air. And in my opinion that is a ridiculous result.'"
It doesn't matter if he is in reach of defenders "at take-off". Shoulder-to-shoulder ball contests apart, you can't do anything to tackle a player before he has got the ball.
I can imagine how in certain circumstances (if much less frequently) the risk to an attacker being tackled in mid air may be as bad as for a defender catching a kick, although generally it isn't directly comparable. But I don't see how you can prohibit a defender from attempting a tackle to prevent a try, and I think the interpretation of the rule that we saw is nonsensical. The attacker was placed in no danger by the tackle, nor was he likely to be, and ATEOTD you can't expect the defender to just leave the player to catch and score, he has to be allowed to prevent the try if he can. Leaving him just the option of getting between ball and ground is absurd.
And another thing - there is no real point in having the rule this way, as every defender will always make that tackle every time. No defender is going to just let the guy sail through to score unmolested, and rightly so.
You could either simply interpret it the Aussie way - ie you can tackle attacker in the air full stop; or maybe if he is tackled, but put in a dangerous position as a result, use that rule to award the penalty. There is very much less chance of an attacker being put in a dangerous position, than a defender by onrushing attackers, and so that would in my book be a reasonable compromise.