any game where a 20stone prop accepts a sin-bin and says "sorry sir" Ahhh the good old Rugby ref myth...That one went a very long time ago, watch any 1st class rugby match, and see how much stick the ref gets.
Personally, I think it's down to "scoring events" In rugby, losing a couple of points for a penalty, isn't that much of a big deal, as there are so many ways and times one can get some points on the board, so contentious Ref decisions aren't challenged as much. Football is the opposite, scoring is rare, so any decision that means an opportunity is lost, or given to the opposition is challenged hotly.
Capt, you seen Twickenham after a match then? Thing is, there's litter and shite after every gathering of humans, you just notice more with football as it goes on more than anything else.