In the end, the "one can always opt-out" clause of new technologies inevitably comes with an expiration date. In the (probably near) future, turning off a wireless device's GPS locater will entail negative social consequences for anyone who chooses to do so. "Efficiency" will demand it, I think. That's simply how things march forward. Can you imagine a middle-class first world citizen without a cell phone these days? Of course not, since wireless communication, once priced for the masses, has become part of the demands of commerce and friendship. One can no longer opt out and expect to be treated as normal.

GPS will soon be available for everyone's phone, but the fact that someone put GPS specifically in sexy women's underwear is telling, since, unlike an iPhone, sexy underwear has no other function than turning your partner on. What will the consequences be for the woman who "opts out" of being tracked by her boyfriend (whether the device is in her phone or her underwear)? Time will tell. Meanwhile, this is one bra every woman should burn.