I travel by plane about 8 to 12 times a year for business and pleasure. I have found that the sensitivity of the metal detectors is vastly different from place to place and even over time in the same place. For example, my small belt buckle won't be a problem at ONT (my "home" airport) but is usually a problem at SFO, no matter how small the buckle is.
TSA rules change with little advertisement. An example would be the shifting policy on cigarette lighters.
If the nipple rings have cause such a problem, why don't ear rings and other piercings? Why was this woman's belly button piercing not a problem? Isn't this a prime example of arbitrary and capricious application of rules and an abuse of power under cover of uniform? I do NOT care for Ms. Alred or her tactics, but in this case, I hope she pushes for enough zeros to choke a horse - not to feather her already fine nest or that of her client, but to put the fear of the dollar in the TSA.
Finally, the purpose of the screenings is to protect the crew, passengers and people on the ground from terrorist activities in the sky. Can someone please tell me what possible danger there could be in a pair of nipple rings? Certainly far less than the pocket knife I forgot about a few months ago and managed to travel with through three airports across the entire width of the country.