You really just shouldn't, and here's why.
1. A woman who decides to take birth control can be taking it for many various reasons.
For example, a woman who suffers from PMDD, Premenstrual Dysphoric Disorder (like myself), would choose to take a birth control to regulate the hormones that are not regular within their body.
2. How does anyone else know what is best for someone else's health besides the person themself?
Unless you are the woman's doctor and know their ENTIRE health history, you really shouldn't have any judgment towards what they take and what they don't.
3. Birth control is more than just a contraceptive.
Birth control can relieve symptoms of many conditions like endometriosis, premenstrual syndrome, acne, and severe menstrual cramps. It can also protect against ovarian cancer.
4. So many women would be in an immense amount of pain if they were without birth control.
It's not all about "controlling birth" for many women.
5. Just because it isn't what YOU want to do with YOUR body, doesn't mean other women should be exposed to your negative opinions.
"Women should not take birth control, it was horrible for me!!" Well, not everyone is the same as you and you should respect other people's opinions.