NY Times: remarketing

With what Google is calling remarketing, specific advertisements now seemingly "follow" individuals even after they have left the original retail site. For weeks, Julie Matlin was met with a pair of shoes she had, at one point, considered purchasing. Though not actually intrusive, many are concerned that remarketing violates their right to privacy (others will be shown the same ads when using your computer). With advertising getting increasingly clever (and creepy), will a "do not track" list be in the near future?