Wenger had a good way of judging what he thought a fair red card is under the last man type ruling. If the player would have the team would have a better chance of scoring from the penalty spot than if the player wasn't fouled then a yellow card is good enough. Otherwise, give a red. That's quite logical but refs will be too stupid to apply that. By Wenger's idea, Suarez's handball would be a red card.

I don't have any problems with the rule the way it is. Yes goalkeepers have much less margin for error; by the rules they can be sent off even if it's not really their fault, but this is such a rare occurrence. I think that's the first time Szczesny has been sent off for us and only the 2nd time out of 100 that a goalkeeper has been sent off under Wenger.