I ran out of titles.

1. "You realize, don't you, that their personal angels are constantly in touch with my Father in heaven?" "(Matthew 18:10) - This is interesting and very perplexing. Why does an omniscent God need angels to keep tabs on us? Or maybe angels are part of God's omniscence. Huh. But yeah, the "their" refers to those young in their faith who might be taken advantage of. Don't. Do. It.
2. "If someone has a hundred sheep and one of them wanders off, doesn't he leave the ninety-nine and go after the one?" (Matthew 18:12) - I think that one of the hardest things for Christians and non-believers today is to accept that we're "sheep." That word stings because of the negative connotation give to it by today's society that adores individualism. It's hard for me to take too. But, even the most individual of us are still following someone. So, it makes sense that you pick your shepherd well, especially one who will find you at the risk of the others.
3. "Haven't you read in your Bible that the Creator originally made man and woman for each other, male and female?" (Matthew 19:4) - This is how Jesus responds to the Pharisees' question of whether divorce is legal. When you read this did you automatically think that it was some response to homosexuality? Funny how that works. But, oddly enough, I think that this makes a pretty good statement. Christians and conservatives make a big deal about the defense of marriage. Marry this statement with the parable Jesus tells a few paragraphs up about the servant whose debt was cancelled by the king but then he demands repayment from another servant, and you have a pretty good roadmap on how to deal with marriage first. Mainly, take care of your own problems first: make sure your marriage is on the level and that marriage is protected and sacred within the Church first. Then, if there's time left over after that, worry about what everyone else is saying and doing to marriage.

Wow, that's a tangent from the question :)