Some commercially produced tampons have also been found to carry dioxins, a carcinogen that is toxic to the immune system and linked to birth defects and lowered sperm counts (the last occuring mainly in men, of course). While "women who wear nylon stockings, rayon dresses, drive around in cars which are 85% plastic and drink Slim-Fast and diet drinks" may only be hypocritically interested in such risks, the rest of us have a right to be careful about what we put in our bodies.
Personally, I find it slightly creepy that large American coporations are trying to convince me to stop up my menstual flow with a chemical-laden phallic object. I much prefer the uses my fellow campus feminists came up with for our Tampon-a-thon, an event we organize to spread information about the risks of tampon use. We spent an evening making tampon crafts, from googly-eyed tampon cows and cheerleaders to tampon necklaces and tampon mini-pontoon boats.