This bothers me because I've seen firsthand what happens when you tell a group of sheltered teenagers (in my case they were religious kids, but it doesn't really matter) that BC is a form of abortion. What happens? They are horrified, wondering why no one told them this before, and guess what -- THEY DON'T USE BIRTH CONTROL BUT END UP HAVING SEX ANYWAY.
Information is power, people! Even for kids who have been homeschooled/not allowed to watch TV or listen to pop music/whatever. They still deserve to be able to make informed decisions, not misled and then left confused when they wind up pregnant.