you clearly haven't spoken with your female friends very much about the pill. it can be a very difficult, painful process to find the "right" medication for them, so there are many girls who choose to find other alternatives to the pill (condoms, IUDs, etc)...
and for the record, you have no right to tell a woman what to do with her body.
one more thing, don't ever post about this kind of thing again... you're the kind of ignorant asshole that makes the rest of us informed and sensative guys look bad.