I don't think you can continue this attitude of "what I want for my kid trumps all" here. There are parents that are not responsible. There are kids who are not/are responsible. There are kids who need this resource. Just because you find it abhorrent does not mean that you trump all.Or, confront the school administration. Make it uncomfortable for them to pursue actions that may be abhorrent to local community standards and may, perhaps, be considered encouraging criminal activity (depending ont he laws in the OP's state concerning underage sexual activity).
At the very least, consider options that might allow for parents to opt-out their children without any negative hit to their academics.
If you came to me, in my administrative role, I would tell you that the health of all the students trumps the discomfort of one parent. In this day and age, the research has been conducted, and the studies show that students need access to birth control. There are plenty of studies that show this is necessary and is the real and honest truth of living in this day.