Cross Ethics (2) (Matthew 18:6-14)

We can say that not caring about the little people is just a contemporary problem.  However, if you look at the Old Testament and Israel’s ideal call they were a nation to be in the forefront to care for the widow and the orphan.  Are these the only little ones that Christ is expressing his concern?  Can we be a little one?  What does it mean that the Lord cares for the little ones?  Does it mean that as the little ones we have a free pass to sin because others made us stumble?  What does the cross teach us about living out the Gospel for our Lord?