So I can see the argument, which pete put in a thread a while back, that realistically as a forward you have to make it clear to the ref that you've been fouled, because defenders are clever at it and will do it subtly. Also that if you don't either fall over or kick them back, they will take advantage and foul you a lot and so dominate you.
I think it's understandable that players look at it that way, but at the same time I think it mustn't be condoned. In the same way that you can understand, say, someone who's being bullied getting his mates to beat up the bully, but you have to set standards higher than that.
Those images of George Best having his ankles clipped by player after player, keeping his balance and keeping on running - that's the standard. That's what you're meant to do. You can understand players not doing it, but it should be regarded as weaker and less noble.
Someone once said that a society without lies is impossible, but so is a society in which lies aren't deprecated.