Immie, I am not violently opposed to a class on abstinence. I'd structure the criteria differently mebbe, but I can see value in a course on sexual ethics, behavior etc. Develop some critical thinking skills a la sexuality, probably do a whole world of good.
What I do object to is a sex ed 101 class, meant to cover the "basics", that uses any significant portion of time teaching abstinence. If the kids still have not mastered the plumbing or the birds and the bees, I don't think it's proper to diverge off into a values course.
It is also painfully obvious that some sexually repressed types see "teaching abstinence" as an alternative to sex ed 101.
Ignorance kills. The kids have to survive into adulthood before we can hope to refine them further.....imo, sex ed 101 is a necessity of life.