If I've said it once, I've said it a thousand times - if football wanted to sort out diving and sort out players crowding the referee, then it could be done very easily. There's no reason they can't cite players and give them hefty bans - and the only reason players do it is because they know they can get away with it.
So the question is, why do FIFA not bother with this, and not bother with goal-line technology? A mixture of the following:
1) They're too occupied with being corrupt (I could elaborate, but not here. Take it from me, FIFA is run by an old-boy's club of disgustingly greedy and self-serving individuals).
2) They're too arrogant to accept that anything needs to be changed, or that anything can be learnt from other sports.
3) They realise that the current state of football means that every game has some kind of red card/ penalty decision/ offside/ disallowed goal controversy. These controversies are what make the headlines, and get people debating about them - mostly people who didn't watch the game, but have read/ watched the incident in question. The controversy is further-reaching than the game itself. The end result is that football has a constant stream of free publicity. Which means more attention, more interest, more fans, more sponsors, and ultimately more $$$.
Watching the game last night was at times like watching wrestling. The whole thing looked slightly staged. Still, I watched it because of the good in football, which we thankfully saw thanks to Mr. Afellay and in particular Mr. Messi.