Funny email my buddy received

[Rev. Rye]

I'm not entirely sure, but I think I posted something like this somewhere before. I've heard that the "proper" reply is that the laws mentioned, for the most part, fall under the ritual section of the Mosaic law, and that the rules against homosexuality falls under the ethical section. So, I countered with another example: In Exodus 21:15 and 17, a chapter after the Ten Commandments are written, God says it is okay for parents to kill unruly children. Deutoronomy 21:18-21 further expounds upon this.

Edit: I found the thing as I mentioned on this very forum:

A Teacher has trouble with her unruly students. It must be noted that the Bible contains excellent advice for this problem in Deuteronomy 21:18-21. "If a man has a stubborn and rebellious son who does not obey his father and mother and will not listen to them when they discipline him, his father and mother shall take hold of him and bring him to the elders at the gate of his town. They shall say to the elders, "This son of ours is stubborn and rebellious. He will not obey us. He is a profligate and a drunkard." Then all the men of his town shall stone him to death. You must purge the evil from among you. All Israel will hear of it and be afraid."
Some dilemmas arise from this situation:

1) Do teachers have the same authority to condemn the children under their care as parents, especially since they act "in loco parentis" (in place of the parents)?
2) Should heavy drinking on the student's part be required for a stoning to take place, or is rebellion enough?
3) Does one need stones to carry it out or would a bullet be a useful alternative?
4) If you're going to use the argument that Jesus made some parts of the Mosaic Code obsolete, then how do you explain Mark 7, where Jesus criticizes priests for failing to follow this particular rule?
5) Is the fact that a rule is in the Bible enough of a reason to keep it alive?

I'd love to see what some theists think of this argument, since I didn't get any replies from theists the first time around.