From the opinion: "Global positioning systems have sure got better in recent years. They can locate you to within 50ft. They can predict traffic delays down to the minute. And as the Supreme Court justice Sonia Sotomayor noted this week, citing a New York case, they can also record, for ever, all your trips to “the psychiatrist, the plastic surgeon, the abortion clinic, the Aids treatment centre, the strip club, the criminal defence attorney, the by-the-hour motel, the union meeting, the mosque, synagogue or church, the gay bar and on and on”. New tracking technologies are a threat to citizens’ expectations of privacy. They must be subjected to strict constitutional safeguards. It is by no means certain, alas, that they will be." Read more
See AlsoJohnson, Kevin. "FBI Cuts Back On GPS Surveillance After Supreme Court Ruling." USA Today, February 6, 2012.