I agree that a lot of medical practitioners don't emphasize this risk nearly enough!
I had to have surgery a few years ago and one of my follow-up prescriptions was for an antibiotic. I asked the nurse about using them in conjunction with my pill and she laughed it off because I had stated on my paperwork that DH had a vasectomy. I pointed out that there are many women who are unaware of the risks of the pill's effectiveness being reduced while on antibiotics and I would rather listen to that caution than leave the office unaware.
RoseAnn