When a woman is repeatedly assaulted on a plane it isn't just the responsibility of the cabin crew to intervene it's the responsibility of any decent minded person.
Society is full of gutless cowards today, who sit back and expect somebody else to deal with all the problems which they kindly drop in someone else's lap and then bravely run away to watch from a safe distance.
Are you two suggesting that if the CC don't intervene then the other passengers should?
That's a very honourable standpoint (although with the potential to turn out rather misguided). I think the cabin crew should have been much tougher (bearing in mind that I wasn't there and only know what tezzer has told us) in this case...not so much because the safety of other passengers was at risk but because it would make people like this think twice next time before becoming violent.